江苏省沿江地区冬油菜施肥指标体系建立--以扬州市江都区为例

摘要

In order to make a reasonable application of N, P and K to winter rapeseed in areas along the Yangtze River in Jiangsu Province, based on different fertilization amounts of N, P and K in 2012-2015 in Jiangdu District, the study was conducted on the fertilization index system of winter rapeseed by using the fertilizer effect function model. The results showed that the rational N, P and K fertilizer application amount could improve the growth of rapeseed and obviously increase rapeseed yield. Using Single-factor and linear plus platform model, the recommended application amount of N fertilizers was 277-308 kg/hm2, with an average of 292.5 kg/hm2, and the recommended application amount of P and K fertilizers was 70 and 98 kg/hm2, respectively.%为解决江苏省沿江地区冬油菜氮磷钾肥量合理用量的问题，以扬州市江都区2012—2013、2013—2014、2014—2015年连续3年氮、磷、钾肥不同肥料用量为试验材料，采用肥料效应函数模型对冬油菜施肥指标体系进行研究。发现合理施用氮磷钾肥对油菜主要农艺性状有促进作用，同时能显著提高油菜的产量；确定了江都区种植冬油菜氮肥推荐量为277~308 kg/hm2，平均为292.5 kg/hm2；磷、钾肥适宜推荐量分别为70、98 kg/hm2，为江苏省沿江地区种植冬油菜提出了合适的施肥建议。