论文部分内容阅读
在蔬菜生产中，合理的轮作换茬，是科学地利用土地，提高蔬菜品质，增加经济效益的有效措施。蔬菜轮作权茬四原则是：l、要充分有效地利用土壤中各种营养成分6根据蔬菜的种类不同，吸收土壤养分也不同的原理，可安排需氮较多的叶菜类．需成较多的茄果类和四钾较多的根廷莱类进?
In vegetable production, rational rotation of cropping is an effective measure to make scientific use of land, improve the quality of vegetables and increase economic benefits. The four principles of crop rotation crop stubble are: l, to fully and effectively use various nutrients in the soil 6 according to the different types of vegetables, soil nutrient absorption is also different principle, can arrange more nitrogen needs of leafy vegetables. Need to become more solanaceous and more potassium Tetraentile into the class?