摘要:
在闽南红壤土丘陵旱作区开展了沟施保水剂对马铃薯产量和土壤水分影响的研究。结果表明:施用保水剂的马铃薯生育期比对照延长5～10d;不同处理现蕾期、收获期均表现为保水剂施用量越大,茎叶的生物量和块茎产量越高,块茎个数越少,最大块茎越大。在块茎生长形成层和根系生长分布层中,保水剂处理土壤含水率在现蕾前略高于对照,茎叶衰老后略低于对照。在马铃薯生产应用中,以沟施保水剂60kghm-2用量的增产增收效果最佳,可增加纯收入3477.0元hm-2,其投入产出比为1:2.93。
关键词:
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保水剂 /
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马铃薯 /
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产量 /
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土壤水分 /
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生长
Abstract:
A study was conducted in the loess hilly and gully regions in the southern Fujian to compare the effects of absorbent in ploughed furrow on the potato productivity and soil moisture content. The results showed that the application of a moisture retention agent significantly prolonged the potato growing period by 5 to 10d,as compared to the control. During the budding and harvesting stages,increasing amounts of the absorbent increased the biomass,tuber yield and size of the largest tuber,with fewer tubers.The moisture contents in the tuber-and-root-forming layers of the treated soil were slightly higher before the budding stage,but slightly lower when the leaves and stems began to wither,than those in the control. For a maximized potato production,the absorbent application at a rate of 60 kghm-2 was recommended for the ploughed furrow around the seed potatoes.With the application,the increase on net income was 3477.0 yuanhm-2 with a cost/return ratio of 1/2.93.
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