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通过在甘蔗行间间种菜用大豆,研究不同大豆品种、不同播期及不同间种密度对蔗田土壤N、P、K及有机质等的影响。结果表明,在相同田间管理和施肥情况下,不论是不同的大豆品种,播期还是间种密度,间作蔗田土壤养分含量都有不同程度的提高;甘蔗单作后,土壤氮、磷、钾和有机质含量明显下降,甘蔗间种大豆则有利于降低相应养分含量的下降幅度,提高有机质含量。说明合理的间种可以维持土壤肥力和保持地力。综合3个因素来看,以2月中旬间种1行中熟大豆品种的效果最好。
The effects of different soybean varieties, different sowing dates and different seed densities on N, P, K and organic matter in sugarcane soils were studied by planting vegetables and soybean between cane rows. The results showed that under the same field management and fertilization, the soil nutrient contents of intercropped sugarcane increased with different degrees regardless of different soybean varieties, sowing date or intercropping density. After single cropping of sugarcane, the contents of N, P, K And the content of organic matter decreased obviously. The intercrop soybean was benefit to reduce the decline of corresponding nutrient content and increase the content of organic matter. This shows that reasonable species can maintain soil fertility and maintain fertility. Comprehensive three factors, in mid-February to plant a row of cooked soybean varieties the best.