宁夏引黄灌区春小麦有机肥替代化肥合理用量试验研究

Reasonable Dosage of Organic Fertilizer Substituting Fertilizer on Spring Wheat in the Yellow River Irrigation Area of Ningxia

在宁夏贺兰县粮菜轮作区域开展春小麦有机肥替代化肥合理用量试验,结果表明:在当地常规化肥施用量的基础上,减少化肥用量20%,同时增施有机肥不同处理对春小麦各生育时期影响较小,对生育性状及产量有不同影响。增施有机肥4500kg/hm^2,春小麦产量增加显著,并达到试验区最高产量。综合考虑成本因素,建议有机肥替代化肥(减量20%时)的施用量以3000~4500kg/hm^2为宜。

An experiment of reasonable dosage of organic fertilizer substituting fertilizer on spring wheat was carried out in food-vegetable rotation area in Helan County, Ningxia. The results showed that based on the conventional fertilization, reducing the fertilizer dosage by 20% and increasing organic fertilizer at different dosages had less effect on every growth stage of spring wheat, while had different effects on its growth characters and yields. Increasing the organic fertilizer by 4 500 kg/hm^2 could increase its yield significantly, which reached the highest yield in the experimental area. In view of cost, it is suggested that the reasonable dosage of organic fertilizer substituting fertilizer (reducing fertilizer by 20%) should be 3 000~4 500 kg/hm^2.