论文部分内容阅读
宁镇丘陵地区黄刚土，耕层浅，肥力低，土壤速效磷含量低，导致棉花低产。本文重点分析丘陵旱地棉花磷肥最佳用量、磷肥临界值等磷肥系数，以深化平衡配套施肥技术。１材料与方法１．１试验田概况试验于 １９９７年在句容市华阳镇刘亭村进行，前茬油菜，土种旱作黄土，含有机质
Huanggang soil in the hilly area of Ningzhen has low tilth of tillage, low fertility and low available phosphorus content in soil, resulting in low yield of cotton. This article focuses on the analysis of the optimum amount of phosphorus fertilizer in hilly dryland cotton, phosphate fertilizer critical value and other phosphorus fertilizer factor, in order to deepen the balanced fertilization technology. 1 Materials and methods 1.1 Experimental field profile The experiment was carried out in Liu Ting Village, Huayang Town, Jurong City in 1997. The former crop rape,