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基于汛期降雨径流试验,研究施肥与作物类型对旱作地表径流氮磷流失规律的影响.结果表明,底肥施用与否对作物生长中后期的表土氮磷浓度及不同形态氮磷浓度和流失量的影响均不显著.作物类型显著影响地表径流深、土壤侵蚀量、颗粒态氮径流浓度和流失量及颗粒态磷流失量,其中径流深的大小顺序为裸地>棉花>玉米>黄豆,土壤侵蚀量与颗粒态氮磷流失量的大小顺序为裸地>棉花≈玉米.地表径流深、土壤侵蚀量、颗粒态氮磷流失量与作物叶面积指数显著负相关,颗粒态氮磷流失量分别与地表径流深和土壤侵蚀量显著正相关.
Based on the rainfall runoff test in flood season, the effects of fertilization and crop type on runoff nitrogen and phosphorus loss in dryland plots were studied.The results showed that the application of base fertilizer had no significant effect on the concentration of nitrogen and phosphorus in topsoil and the concentration and loss of different forms of nitrogen and phosphorus But the effect was not significant.The crop type significantly affected the surface runoff depth, soil erosion amount, runoff concentration and loss of particulate nitrogen and the amount of phosphorus loss, of which the runoff depth order was bare land> cotton> corn> soybean, soil erosion The order of amount of nitrogen and phosphorus loss in granular and particulate was bare> cotton ≈ corn. The surface runoff depth, soil erosion, particulate nitrogen and phosphorus loss and crop leaf area index were negatively correlated, the amount of particulate nitrogen and phosphorus loss were Surface runoff depth and soil erosion were significantly and positively correlated.