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对江苏省溧水县某地有机种植区域土壤营养成分进行基础测定,根据土壤供肥能力及作物需肥特性,制定农作物耕作方案:水稻与小麦、大豆与小麦,实行作物轮作。合理变量施用有机肥,从源头上减少有机种植区域富余氮、磷元素的流失,通过有机农业的测土配肥控氮固磷集成技术改善农业面源污染。在不降低作物产量的前提条件下,有机种植区域流出水体中CODMn(化学需氧量)、总氮、总磷由4.6、5.34、0.68 mg/L减少到2.1、0.45、0.08 mg/L,水质达到《地表水环境质量标准》Ⅱ类标准。
Based on the soil nutrient components in the organic planting area in Lishui County, Jiangsu Province, the crop cultivation programs were formulated according to the soil fertility and the characteristics of the crops to be fertilized: rice and wheat, soybean and wheat were crop rotation. The rational use of organic manure to reduce the loss of excess nitrogen and phosphorus in the organic planting area from the source, and to improve the agricultural non-point source pollution through the soil testing with organic farming combined with nitrogen and phosphorus fixation. Under the premise of not reducing the crop yield, the CODMn (chemical oxygen demand), total nitrogen and total phosphorus in the organic planting area decreased from 4.6, 5.34 and 0.68 mg / L to 2.1, 0.45 and 0.08 mg / L respectively, and the water quality Achieve “surface water environmental quality standards” Ⅱ standard.