梯田玉米有机肥最佳施用量的研究

Study on the optimum organic manure application rates for maize in terrace

摘要: 施用2种有机肥(羊粪、猪粪)，并配施少量化肥，进行雨养梯田种植玉米的田间试验。结果表明，施有机肥后土壤总孔隙度、毛管孔隙度分别提高5.2%～13.1%和3.6%～10.0%，土壤容重降低1.8%～7.9%；雨后土壤含水量提高9.8%～15.3%；玉米平均株高、平均茎粗分别增加0.1～6.5cm和0.1～0.5cm，玉米产量提高33.5%～77.2%。玉米产量与有机肥施用量呈3次方关系，并由此确定了不同水文年型有机肥最佳施用量。

Abstract: The effects of two kinds of organic manures on maize in unirrigated terrace were studied by the field test.The results showed that the total soil porosity was increased by 5.2%～13.1%,soil capillary porosity by 3.6%～10.0%,soil water content by 9.8%～15.3% after rain,however soil density was declined by 1.8%～7.9%,the average plant height and stem diameter increased by 0.1～6.5cm and 0.1～0.5cm,respectively,the maize yield increased by 33.5%～77.2% by organic manure application. The maize yield was related to the amount of organic manure applied and the optimum amount of organic manure applied was determined in different water years.