油菜既是一个高产的经济作物,又是一个良好的养地作物。为了提高油菜产量和促进粮棉增产,现就关中灌区甘兰型油菜的轮作和种植方式谈点看法。一、粮油轮作和种植方式粮油轮作是关中灌区主要轮作方式,经常采用的有以下几种: 1.粮油两年三熟和三年五熟。关中中、西部宝鸡峡灌区和其它生产条件较差,人均耕地在2亩以上,粮食生产一年一熟生长期有余,一年两熟生长期不足,且部分耕地夏闲的地区,实行粮油二年三熟(小麦→油菜+玉米)和三年五熟(小麦+玉米→小麦→油菜+玉 Rape is both a high-yielding cash crop and a good growing crop. In order to improve the yield of rapeseed and increase the yield of grain and cotton, we will talk about the rotation and planting methods of Brassica napus in Guanzhong irrigation area. First, grain rotation and planting methods Grain and oil rotation is Guanzhong Irrigation District, the main rotation mode, are often used in the following categories: 1. Grain and oil two crops three years and five years. Guanzhong and West Bajixia Irrigation District and other poor production conditions, average per capita arable land more than 2 acres, more than a year of grain production a year more than one growing season, lack of growth in two years a year, and some areas of cultivated land summer and leisure, the implementation of two grain Three ripening (wheat → rape + corn) and three years of five cooked (wheat + corn → wheat → rape + jade