青紫泥是嘉兴地区有代表性的一种稻田土壤,三熟制又是当地稻田中广泛采用的一种耕作制度。为此,在青紫泥稻田中研究连年种植三熟制的增产效应问题,将能为当地粮食生产的发展和增产潜力的评价,提供一系列的基础数据。这对该地区的农业规划也有重要的参考价值。 Purple purple clay is a representative of paddy soil in Jiaxing area, three-cropping system is also widely used in local paddy farming system. Therefore, to study the yield-increasing effect of planting three-cropping system in the purple-green paddy rice fields will provide a series of basic data for the evaluation of the development of the local grain production and the stimulation potential. This is also an important reference for the agricultural planning in the area.