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该文根据试验数据研究了不同作物种植模式对低肥力砂地土壤有机质和速效钾含量的影响。结果显示,在低肥砂质土壤上大豆单作、豇豆单作、绿豆-玉米一年两熟、小麦-玉米-大豆两年三熟、花生单作两年能提高土壤有机质含量10.6%-33.8%,大豆单作、豇豆单作、绿豆-玉米一年两熟、小麦-玉米-大豆两年三熟、甘薯单作、马铃薯-玉米轮作两年提高土壤速效钾含量22.9%-31.7%。相反,小麦-玉米一年两熟、玉米单作和谷子单作,连续种植两年后,降低了土壤有机质和速效钾含量,不利于砂质农田培肥。该文还提出砂质农田培肥的具体生态种植模式和技术建议,为砂地土壤改良提供理论依据。
Based on the experimental data, the paper studied the effects of different cropping patterns on soil organic matter and available potassium in low-fertility sand. The results showed that single cropping of soybean, single cowpea, mung bean-corn double cropping in one year and three-year wheat-corn-soybean ripening in low-sandy soil could increase soil organic matter content by 10.6% -33.8 %, Soybean monoculture, single cowpea, mung bean - corn two crops a year, wheat - corn - soybean two years of three cooked, sweet potato single crop, potato - corn rotation two years to increase soil available potassium 22.9% -31.7%. In contrast, wheat-corn two crops a year, single corn and millet monocrops, continuous planting two years later, reducing soil organic matter and available potassium content is not conducive to sandy farmland fertility. The paper also proposed specific ecological planting mode and technical suggestion on sandy farmland fertilization, which provided theoretical basis for soil improvement in sandy land.