三熟制栽培是个整体,品种很多,特性不一,三熟接五茬,季节性很强。各熟作物之间存在着与天争时,与地争田的矛盾。既要掌握季节不违农时,又要保证作物有一定的生育时期,否则就不能达到熟熟高产,季季丰收。选用生育期短的品种,可以解决季节矛盾,但增产潜力较小;而生长期长的品种增产潜力较大,往往成熟期较迟,又会延误后茬作物的季节。合理的品种搭配,茬口 Mature cultivation is a whole, a lot of variety, different characteristics, Mie then five stubble, seasonal strong. There is a conflict between the cooked crops and the days when they compete with the land. It is necessary to grasp the season is not against the agriculture, but also to ensure that the crop has a certain period of fertility, or you can not achieve cooked high yield, seasonal harvest. The selection of varieties with short growth period can solve the seasonal contradiction, but the yield potential is small. However, the long-growing varieties have large potential for increasing yield, often later in the mature period, which may delay the season of the following crop. With a reasonable variety, crop stubble