1997 Vol. 12, No. 4
Display Method:
1997, 12(4): 1-4.
Abstract:
Some fine sugarcane varieties were induced to bloom by photoperiodic treatment with blue and far-red light. The intergeneric hybridization between sugarcane and S. arundinaceum, sugarcane and Miscanthus anderss have been achieved by settling the technical barriers, i e spike castration of female plants; unsynchronization of flowering periods between male and female plants; and infertility of intergeneric hybridization. The new forage-grass hybrid progenies have been supplied as green fodder all the year round because of their non-flowering and non withering characters in the natural condition of subtropic area.
Some fine sugarcane varieties were induced to bloom by photoperiodic treatment with blue and far-red light. The intergeneric hybridization between sugarcane and S. arundinaceum, sugarcane and Miscanthus anderss have been achieved by settling the technical barriers, i e spike castration of female plants; unsynchronization of flowering periods between male and female plants; and infertility of intergeneric hybridization. The new forage-grass hybrid progenies have been supplied as green fodder all the year round because of their non-flowering and non withering characters in the natural condition of subtropic area.
1997, 12(4): 5-9.
Abstract:
Spring peanut seeds were treated with three chemical compounds, 9011, 9012 and 9013 respectively, then stored in air-tight.The conventionally stored seeds of spring peanut or autumn peanut were used as control Yield tests and field demonstrating were made in next year The results showed that the germinating rate of Chemicals treated seeds were higher than that of conventionally stored spring seeds and similar to autumn seeds.To compare with untreated spring and autumn seeds,the growth condition,branch number of single plant,fruit-bearing branch,grain filled rate of chemicals-treated spring peanut seeds were higher.The effectiveness of three chemical compounds was 901390119012.This experiment suggested that the chemicals-treated spring seeds may substitute the autumn peanut seeds to be used in peanut production.
Spring peanut seeds were treated with three chemical compounds, 9011, 9012 and 9013 respectively, then stored in air-tight.The conventionally stored seeds of spring peanut or autumn peanut were used as control Yield tests and field demonstrating were made in next year The results showed that the germinating rate of Chemicals treated seeds were higher than that of conventionally stored spring seeds and similar to autumn seeds.To compare with untreated spring and autumn seeds,the growth condition,branch number of single plant,fruit-bearing branch,grain filled rate of chemicals-treated spring peanut seeds were higher.The effectiveness of three chemical compounds was 901390119012.This experiment suggested that the chemicals-treated spring seeds may substitute the autumn peanut seeds to be used in peanut production.
1997, 12(4): 10-14.
Abstract:
The effect of natural enemies,such as field spiders etc,on controlling planthopper has been analysed and compared based on the survey results of population dynamics of pests and their natural enemies in double cropping rice fields of small watersheds in north Fujian.It provided a scientific basis for enlarging controlling index,decreasing chemical dosage in field practice.
The effect of natural enemies,such as field spiders etc,on controlling planthopper has been analysed and compared based on the survey results of population dynamics of pests and their natural enemies in double cropping rice fields of small watersheds in north Fujian.It provided a scientific basis for enlarging controlling index,decreasing chemical dosage in field practice.
1997, 12(4): 15-18.
Abstract:
The prevalent pattern of rice bacterial blight had been observed for 23 years in rice paddy fields in lower reaches of Ming River, and the dominant factor of the disease prevalence was definited.By using progressive regression,three forecasting models for analysing multi factor prevalence have been established. x2 examination showed that,the fitting probabilities of the theoretical with practical data were 99.5%,the historial conformable rate reached 91.4%～100%. The preliminary forecasting results by using these models in 1995 and 1996 were conformed with the practice which the disease was lightly occured in this area.
The prevalent pattern of rice bacterial blight had been observed for 23 years in rice paddy fields in lower reaches of Ming River, and the dominant factor of the disease prevalence was definited.By using progressive regression,three forecasting models for analysing multi factor prevalence have been established. x2 examination showed that,the fitting probabilities of the theoretical with practical data were 99.5%,the historial conformable rate reached 91.4%～100%. The preliminary forecasting results by using these models in 1995 and 1996 were conformed with the practice which the disease was lightly occured in this area.
1997, 12(4): 19-23.
Abstract:
In order to explore the fruit development of extremely late maturing Longan species(Lidongben),the dynamic changes of fresh and dry weight,as well as the distribution of moisture and solute content in whole fruit or different parts of fruit were analysed by measurement of fruit weight at various maturing periods.The results showed that,the fresh and dry weight of peel increased with the development of fruit;the formation of aril and emergence of embroy occured in the approximately same period,however,the rapidly increasing period of dry matter accumulation in aril occured when the dry matter accumulation in embroy reached the peak period.The water and solute content at early fruit developing period mainly went into peel and kenel but it come to aril at the late period.In matured fruits,the highest water content was distributed to arils and the highest solute content was to the seeds.
In order to explore the fruit development of extremely late maturing Longan species(Lidongben),the dynamic changes of fresh and dry weight,as well as the distribution of moisture and solute content in whole fruit or different parts of fruit were analysed by measurement of fruit weight at various maturing periods.The results showed that,the fresh and dry weight of peel increased with the development of fruit;the formation of aril and emergence of embroy occured in the approximately same period,however,the rapidly increasing period of dry matter accumulation in aril occured when the dry matter accumulation in embroy reached the peak period.The water and solute content at early fruit developing period mainly went into peel and kenel but it come to aril at the late period.In matured fruits,the highest water content was distributed to arils and the highest solute content was to the seeds.
1997, 12(4): 24-27.
Abstract:
The seed production of seedless watermelon was carried out in Northwest part of China.Studies on relative techniques for seed production showed that,the seed amount,germinating rate of seeds,sprouting rate of seeds in field condition varied with combinations and climate condition within a certain range,the weight of single melon was positively related to its seed amount;the seed amount of the melons growing at lst to 3rd female flower knot,was negatively related to its flower locating position from lower to higher part of the plant.Optimum melon number for the seed production was 2.7-3.15?103/hm2.
The seed production of seedless watermelon was carried out in Northwest part of China.Studies on relative techniques for seed production showed that,the seed amount,germinating rate of seeds,sprouting rate of seeds in field condition varied with combinations and climate condition within a certain range,the weight of single melon was positively related to its seed amount;the seed amount of the melons growing at lst to 3rd female flower knot,was negatively related to its flower locating position from lower to higher part of the plant.Optimum melon number for the seed production was 2.7-3.15?103/hm2.
1997, 12(4): 28-31.
Abstract:
A comprehensive plot experiment of chemical regulation was carried out during the differentiation of flower buds in November-December and physiological fruit drop in May June,1992-1994 Combination of 6-BA 200 mg/L+B9 2000 mg/L and GA3.10 mg/L+2,4-D 5 mg/L were used respectively.The results showed that the increasing amount and rate of the treated winter shoots was only 35.03% and 37.59% that of the control.The flushing rate of the flower clusters was up to 92.33%, increased 81.75% over that of the control,markedly promoting the flower bud differentiation.The rate of degradation in inflorescene decreased,only 15.28% that of the control.The branch clusters of flowers increased by 30.02%.The treatments increased 67.40% in fertile fruits and 48.00% in fruit clusters.The average yield per tree was up to 57.00 kg,an increase of 61.61% over that of the control.The flushing rate of the flower clusters was up to 90.41% with an average 46.10 fertile fruits per cluster.The total yield of 604 treated trees(2.37 hm2)was up to 38744.70 kg with average yield of 64.20 kg/tree, reaching a higher level in present longan production.
A comprehensive plot experiment of chemical regulation was carried out during the differentiation of flower buds in November-December and physiological fruit drop in May June,1992-1994 Combination of 6-BA 200 mg/L+B9 2000 mg/L and GA3.10 mg/L+2,4-D 5 mg/L were used respectively.The results showed that the increasing amount and rate of the treated winter shoots was only 35.03% and 37.59% that of the control.The flushing rate of the flower clusters was up to 92.33%, increased 81.75% over that of the control,markedly promoting the flower bud differentiation.The rate of degradation in inflorescene decreased,only 15.28% that of the control.The branch clusters of flowers increased by 30.02%.The treatments increased 67.40% in fertile fruits and 48.00% in fruit clusters.The average yield per tree was up to 57.00 kg,an increase of 61.61% over that of the control.The flushing rate of the flower clusters was up to 90.41% with an average 46.10 fertile fruits per cluster.The total yield of 604 treated trees(2.37 hm2)was up to 38744.70 kg with average yield of 64.20 kg/tree, reaching a higher level in present longan production.
1997, 12(4): 32-34.
Abstract:
After harvesting longan fruits,we used sulphur pumigation,radiation with 60Co and Film -reagent(Ⅰ、Ⅱ)to pre-treat them.Then we stored them at 8±1℃ temperature,measured the respiration rate of longan fruits.The result indicated:through the approriate dose of sulphur pumigation,radiation treatment and the film-reagent(Ⅰ、Ⅱ)can reduced the respiration rate or delay the increase of respiration.However,the film-reagent was the best way for prolonging the storage life and increasing healthy fruit rate.
After harvesting longan fruits,we used sulphur pumigation,radiation with 60Co and Film -reagent(Ⅰ、Ⅱ)to pre-treat them.Then we stored them at 8±1℃ temperature,measured the respiration rate of longan fruits.The result indicated:through the approriate dose of sulphur pumigation,radiation treatment and the film-reagent(Ⅰ、Ⅱ)can reduced the respiration rate or delay the increase of respiration.However,the film-reagent was the best way for prolonging the storage life and increasing healthy fruit rate.
1997, 12(4): 35-38.
Abstract:
This study estimated heritability of 13 characters in third generation of Putian Black Ducks using method of sib correlation analysis.It also estimated correlation among major characters.The result showed:Heritablities of egg number in Various periods was high,egg weight was low.Body weight and first laying age had middlle heritability.Egg number and egg weight in various periods were positively and highly correlated with hereditary and middlingly correlated with phenotype.Egg number at 300 days and first laying ages were negatively correlated with hereditary and phenotype.Egg weight ay 300 days and body weight in the same period were positively correlated with hereditary and middlingly correlated with phenotype.
This study estimated heritability of 13 characters in third generation of Putian Black Ducks using method of sib correlation analysis.It also estimated correlation among major characters.The result showed:Heritablities of egg number in Various periods was high,egg weight was low.Body weight and first laying age had middlle heritability.Egg number and egg weight in various periods were positively and highly correlated with hereditary and middlingly correlated with phenotype.Egg number at 300 days and first laying ages were negatively correlated with hereditary and phenotype.Egg weight ay 300 days and body weight in the same period were positively correlated with hereditary and middlingly correlated with phenotype.
1997, 12(4): 39-41.
Abstract:
A bacterial strain was isolated from lungs of growing muscovy ducklings characterized by dyspnea, cough, hemorrhage or ecchymosis in lung, airsacculitis and hemorrhage of trachea mucosa. It was identified as Proteus mirabilis by staining, microscopy and biochemical test Higher pathogenicity was found by experimental infection to muscovy ducklings.
A bacterial strain was isolated from lungs of growing muscovy ducklings characterized by dyspnea, cough, hemorrhage or ecchymosis in lung, airsacculitis and hemorrhage of trachea mucosa. It was identified as Proteus mirabilis by staining, microscopy and biochemical test Higher pathogenicity was found by experimental infection to muscovy ducklings.
1997, 12(4): 42-46.
Abstract:
This paper reported the result of classifying 17 species and varieties of Azolla based on priniciple of quantitative classification 13 indexs were determined according to the pattern of the different numbers of septa inside the glochidia of massulea,a male reproductive organ of Azolla,and the quantity of glochidia was counted for clustering analysis by using pattern analytic package.In relation of fusion group with interspecific affinity and specific recognition,the quantitative classification is regarded as an ideal way for Azolla classification and provides a prelimlnary foundation in application of computer to the study on Azolla.
This paper reported the result of classifying 17 species and varieties of Azolla based on priniciple of quantitative classification 13 indexs were determined according to the pattern of the different numbers of septa inside the glochidia of massulea,a male reproductive organ of Azolla,and the quantity of glochidia was counted for clustering analysis by using pattern analytic package.In relation of fusion group with interspecific affinity and specific recognition,the quantitative classification is regarded as an ideal way for Azolla classification and provides a prelimlnary foundation in application of computer to the study on Azolla.
1997, 12(4): 47-51.
Abstract:
This paper summarized the available silica(SiO2)content in the major soil types of Fujian province on the basis of analysing 179 soil samples from both cultivated and uncultivated land and indoor simulant experiments, the results demonstrated that there is silica deficiency in the soil of Fujian province and the variation of available silica content in soil has a close relationship with the condition of soil matrix,pH,farming system and fertilizer application. It is also suggested that exploitation and application of silica fertilizer is an important measure to sustainable agriculture.
This paper summarized the available silica(SiO2)content in the major soil types of Fujian province on the basis of analysing 179 soil samples from both cultivated and uncultivated land and indoor simulant experiments, the results demonstrated that there is silica deficiency in the soil of Fujian province and the variation of available silica content in soil has a close relationship with the condition of soil matrix,pH,farming system and fertilizer application. It is also suggested that exploitation and application of silica fertilizer is an important measure to sustainable agriculture.
1997, 12(4): 52-54.
Abstract:
Ca and K in soil reference materials were analysed by ED-XRF. The results showed that the analysis precission RSD was less than 0.2% for Ca and K The analysis method was rapid and reliable.
Ca and K in soil reference materials were analysed by ED-XRF. The results showed that the analysis precission RSD was less than 0.2% for Ca and K The analysis method was rapid and reliable.
1997, 12(4): 55-59.
Abstract:
Based on the characteristics of sci-tech papers, the writing requirements for different types of sci-tech papers were investigated. The authors emphatically analysed the writing standardization for agricultural sci-tech papers. It provided references for sci-tech personnel in writing sci-tech papers.
Based on the characteristics of sci-tech papers, the writing requirements for different types of sci-tech papers were investigated. The authors emphatically analysed the writing standardization for agricultural sci-tech papers. It provided references for sci-tech personnel in writing sci-tech papers.
