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一、研究目的复种方式是多熟地区一年内作物的搭配方式,是由不同季节的作物组成的.几个复种方式组成复种轮作。因此,多熟地区的一个复种方式,在轮作中相当于一熟地区的一种作物,是复种轮作的基本单位和组成成份,是复种轮作的基础。因此,对复种方式的内在规律,研究得越透,越有利于复种轮作的组成。本研究的目的,就在于研究南昌地区棉田复种方式的茬口特性和经济效益,为建立合理的复种轮作提供依据。
First, the purpose of study Multiple cropping is a multi-cropping area with more than one year with the way the crop is composed of crops in different seasons. Therefore, a multiple cropping system in a multi-cropping area, which is equivalent to a crop in a single cropping area during rotation, is the basic unit and composition of multiple cropping and is the basis for multiple cropping. Therefore, the inherent law of multiple cropping methods, the more thoroughly studied, the more conducive to the composition of multiple crop rotation. The purpose of this study is to study the characteristics of stubble and economic benefits of multiple cropping in cotton field in Nanchang and provide the basis for establishing a reasonable multiple crop rotation.