Effects of Intercropping Peanut on Soil Properties and Microclimate at Banana Orchards
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摘要:
目的 研究在香蕉园套种花生(兼作绿肥)的综合效应,为海南省推广蕉园套种绿肥等作物提供科学依据。 方法 设置5个处理:香蕉单作(CK)、3行双粒花生套种香蕉+覆盖还田、3行双粒花生套种香蕉+翻压还田、5行单粒花生套种香蕉+覆盖还田、5行单粒花生套种香蕉+翻压还田,探讨不同播种方式与还田方式对香蕉生长、花生生长、蕉园土壤、蕉园小气候环境,以及对其产量和品质的影响。 结果 5行单粒播种+覆盖还田处理的各项主要指标表现最佳,与对照相比,香蕉苗期株高、茎围和青叶数分别增加89.74%、11.89%和32.05%;地表湿度增加4.61%,地温和气温分别降低2.07%和8.39%;杂草数减少84.62%,香蕉株被害率减少65.21%;土壤碱解氮、有效磷、速效钾、交换性钙和交换性镁含量分别提高 17.18%、6.17%、76.01%、63.58%和34.59%,土壤有机质含量提高25.15%;蔗糖酶活性提高2.38倍,脲酶、酸性磷酸酶、过氧化氢酶和纤维素酶含量分别提高44.27%、75.92%、13.94%和11.58%;>2 mm粒级土壤团聚体含量由22.0%提高到35.22%;香蕉的产量、可溶性糖含量、维生素C含量和可溶性固形物含量分别提高2.31%、15.21%、5.10%和8.73%。 结论 在香蕉园套种花生能有效提高蕉园土壤中养分含量与酶活性,改善土壤结构,有利于调节蕉园温湿度;明显减少杂草的生长和害虫的危害;显著促进香蕉生长,提高产量和品质。综合作物产量、作物品质、土壤改良、生态环境优化及对香蕉生长的影响效应,在蕉园套种花生以5行单粒播种加覆盖还田的套种模式效果最优。 Abstract:Objective Effects of intercropping peanut (also as green fertilizer) on soil and microclimate at banana orchards were studied. Method Five different planting practices at a banana orchard were implemented for comparison. They included CK (banana monoculture as control), Method A (3 rows of 2-peanuts-sowing for intercropping with banana followed by mulching with the plant waste), Method B (3 rows of 2-peanut-sowing for intercropping with banana followed by turning the plant waste into field soil), Method C (5 rows of one-peanut-sowing for intercropping with banana followed by mulching with the plant waste), and Method D (5 rows of one-peanut-sowing for intercropping with banana followed by turning the plant waste into field soil). Effects of the various seeding/waste treatments on the physiochemical properties of soil and microclimate at the orchard as well as the banana/peanut yields and quality were determined. Result Method C was found to perform with the highest scores on the major evaluation criteria among all. The banana seedling height, stem circumference and green leaf count were 89.74%, 11.89% and 32.05%, respectively, greater than those under CK. With respect to the microclimate, Method C increased the surface humidity by 4.61%, decreased the ground temperature by 2.07%, and lowered the air temperature by 8.39%, as compared with CK. Furthermore, it also reduced the weed growth by 84.62% and the banana plant damage rate by 65.21%. The contents of available N, P, K, Ca, and Mg in the orchard soil were significantly increased by 17.18%, 6.17%, 76.01%, 63.58%, and 34.59%, respectively, while the organic matters significantly increased by 25.15% under Method C over CK. Among the enzymes in the soil, the activity of invertase was 2.38 times of that under CK at an extremely significant different level; and, those of urease, acid phosphatase, catalase, and cellulase 44.27%, 75.92%, 13.94%, and 11.58%, respectively, higher than those under CK. Method C also resulted in a rise on the percent soil aggregates with a size larger than 2mm from 22.0% under CK to 35.22%. Moreover, the treatment produced bananas with increases on yield of 2.31%, on soluble sugar of 15.21%, on VC of 5.10%, and on soluble solids of 8.73%. Conclusion It appeared that by intercropping banana plants with peanut bushes followed by mulching the ground with peanut plant wastes could significantly improve the structure, fertility, and enzymatic activities of the soil as well as the microclimatic conditions, such as temperature and humidity, at the orchard. In the end, besides the ecological benefits, the practice would promote the banana growth, reduce the pest infestation, and weed proliferation, as well as improve the crop yield and quality for the orchard operation. -
Key words:
- Banana /
- peanut /
- intercropping /
- orchard microclimate /
- soil environment
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表 1 套种花生对香蕉苗期生长状况的影响
Table 1. Growth of banana seedlings under intercropping
处理
Treatment株高
Plant height/cm茎围
Stem circumference /cm青叶数
Green leaf number/pieceCK 19.50 bB 10.43 cB 8.33 bB 3行双粒 36.00 aA 12.87 aA 10.33 aAB 5行单粒 37.00 aA 11.67 bAB 11.00 aA 注:(1)表1~6中的数据,不同小写字母者表示差异显著(P<0.05),不同大写字母者表示差异极显著(P<0.01);(2)表1~3中的套种处理数据均为翻压还田处理与覆盖还田处理共6个小区的平均值。
Note:(1)Data with different lowercase letters on Tables 1-6 represent significant difference between treatments at 0.05 level, and those with different capital letters represent significant difference between treatments at 0.01 level.(2)Data associated with planting practices on Tables 1-3 are averages from 6 testing plots.表 2 不同播种方式对花生地上生物量和养分蓄积量的影响
Table 2. Effects of seeding on aboveground biomass and nutrient accumulation of peanut plants
(单位:kg·hm−2) 处理
Treatment地上生物量
Aboveground biomass养分蓄积量 Nutrient storage 产量 Yield 氮 N 磷 P 钾 K 钙 Ga 镁 Mg 3行双粒 29 469.49 bB 539.29 bB 44.59 bB 527.50 bB 163.26 bB 76.62 bA 4 430.02 bA 5行单粒 35 823.00 aA 877.66 aA 69.17 aA 662.73 aA 203.47 aA 96.72 aA 5 525.03 aA 表 3 套种花生对蕉园小气候环境的影响
Table 3. Microclimate at banana orchard under intercropping
处理
Treatment气温
Air temperature/℃地温
Ground temperature/℃地表湿度
Surface humidity/%杂草数
Weed number/
(株·m−2)香蕉被害株率
Rate of damaged
plants/%CK 31.00 aA 29.00 aA 65.00 bA 13.00 aA 76.67 aA 3行双粒 29.43 bAB 28.25 aA 67.00 abA 3.70 bB 36.67 bB 5行单粒 28.40 bB 28.40 aA 68.00 aA 2.00 bB 26.67 bB 表 4 套种花生对蕉园土壤养分状况的影响
Table 4. Soil fertility at banana orchard under intercropping
处理
Treatment酸碱度
pH有机质
Organic matter/(g·kg−1)碱解N
Alkaline hydrolytic N/(mg·kg−1)速效P
Available P/(mg·kg−1)速效K
Available K/(mg·kg−1)交换性钙
Exchangeable Ca/(mg·kg−1)交换性镁
Exchangeable Mg/(mg·kg−1)CK 6.69 aA 21.15 dC 166.60 dC 26.4 bA 168.10 cC 584.6 cC 119.3 bA 3行双粒+覆盖 6.70 aA 23.95 bcB 181.20 bcB 27.10 abA 301.60 aA 694.13 bB 133.45 abA 3行双粒+翻压 6.71 aA 22.85 cBC 177.25 cBC 27.47 abA 211.90 bBC 683.75 bBC 138.25 abA 5行单粒+覆盖 6.70 aA 26.47 aA 195.23 aA 28.03 abA 295.87 aA 956.27 aA 160.57 aA 5行单粒+翻压 6.75 aA 24.80 bAB 187.10 abAB 28.67 aA 234.85 bB 707.07 bB 146.30 abA 表 5 套种花生对蕉园土壤酶活性的影响
Table 5. Enzyme activity in soil at banana orchard under intercropping
处理
Treatment过氧化氢酶
S-CAT/
(μmol·d−1·g−1)脱氢酶
sDHA/
(mg·d−1·g−1)蔗糖酶
S-SC/
(mg·d−1·g−1)脲酶
S-UE/
(μg·d−1·g−1)酸性磷酸酶
S-ACP/
(μmol·d−1·g−1)纤维素酶
S-CL/
(mg·d−1·g−1)CK 50.23 cB 0.033 aA 24.35 cC 733.76 cC 22.30 bC 29.87 cC 3行双粒+覆盖 55.00 abAB 0.053 aA 39.40 bB 953.52 abAB 34.57 aAB 32.18 bBC 3行双粒+翻压 51.93 bcB 0.035 aA 41.76 bB 853.66 bBC 24.96 bBC 35.19 abAB 5行单粒+覆盖 57.23 aA 0.049 aA 82.21 aA 1058.57 aA 39.23 aA 33.33 bABC 5行单粒+翻压 53.04 bcAB 0.038 aA 36.64 bB 911.96 bAB 26.16 bBC 37.50 aA 表 6 套种花生对香蕉产量和品质的影响
Table 6. Yield and quality of banana grown under intercropping
处理
Treatment株产量
Plant yield/kg维生素 C
VC/(mg·hg−1)可溶性糖
Soluble sugar/(g·hg−1)可溶性固形物
Soluble solids/%CK 23.42 aA 6.86 aA 9.73 cB 13.98 bA 3行双粒+覆盖 24.39 aA 7.09 aA 10.11 bB 14.83 abA 3行双粒+翻压 24.49aA 7.07 aA 10.14 bB 14.76 abA 5行单粒+覆盖 23.96 aA 7.21 aA 11.21 aA 15.20 aA 5行单粒+翻压 23.83 aA 7.19 aA 11.13 aA 14.98 aA -
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