螯合有机肥在萝卜上的适宜用量研究

Abstract

通过对山东金沂蒙生态肥业有限公司生产的螯合有机肥在萝卜上不同用量的田间小区试验，采用Excel拟合了一元三次、一元二次、一元一次函数，并通过一元二次函数计算了该产品在萝卜上的最高产量施用量891.9kg/667m2，萝卜最高产量3545kg/667m2；最佳经济施用量177.6kg/667m2，萝卜最佳经济产量3188kg/667m2；拟合的效应函数相关性好，r在0.9027~0.9907之间，达到显著至极显著水平。该肥适宜用量增产幅度在10%以上；可净收150元/667m2，增产主要来源于萝卜长度增加。施用该肥对萝卜的全钙、全镁含量有所提高，随用量增加呈缓抛物线变化。适宜用量还可提高土壤pH、CEC，改良酸性土壤；同时，该肥能为土壤供应有机质、氮、磷和钾，有效培肥地力。本次试验该肥的适宜用量在200kg/667m2左右，与推荐用量一致。 Through the field plot test in radish with different dosage of chelate organic fertilizer, which is manufactured by Shandong Jin Yimeng Ecological Fertilizer limited company, we use Excel to fit cubic function of one variable, linear quadratic function and linear function of one variable. With the fertilizer, the application rate of the maximum yield is 891.9 kg/667m2 and the radish maxi-mum yield is 3545 kg/667m2, which is calculated by linear quadratic function. The best economic application is 177.6 kg/667m2, and the radish best economic yield is 3188 kg/667m2. The fitting effect function is good, and the r is 0.902 - 0.9907, reaching a significant and extremely significant level. The range of increase yield is more than 10% by the appropriate dosage of Chelate Organic Fertilizer, and the net revenue can be 150 yuan/667m2. It mainly comes from the increasing of radish length. The content of total calcium and magnesium in radish is increased with the increasing dosage of the fertilizer in slow parabola. The appropriate dosage also can improve the soil pH, CEC and acid soil. At the same time, the fertilizer can provide soil with organic matter, nitrogen, phosphorus and potassium, and effectively enrich the soil. In this experiment, the appropriate dosage of the fertilizer is around 200 kg/667m2, consistent with the recommended dosage.