冬小麦-夏玉米轮作区动态平衡施肥配方的研究

Dynamically Balanced Fertilization with Formulations in Winter Wheat-Summer Maize Rotation System

介绍了不同配方处理对夏玉米产量、肥料的综合利用率、肥料的经济效益及经济施肥量的影响,阐述了不同处理土壤养分的消长规律。据此确定了冬小麦-夏玉米轮作体系中夏玉米的动态平衡施肥配方为1︰(0.4±0.05)︰0.4～0.5。按该配方比例生产了配方肥,经天津市、县(区)有关农业技术推广部门的协作,2003年仅天津市就已推广5.99万hm2,节本增收5000多万元。

Fixed-site field experiment was carded out in winter wheat-summer maize rotation system in Wuqing District of Tianjin to study the effects of different fertilizer formulations on summer maize yield, comprehensive utilization efficiency of fertilizer, economic benefits and optimum fertilizer application rates. The dynamics of soil nutrients under different fertilizer treatments were also researched. The results show that the dynamic balanced fertilization formulation was N ： P2O5 ： K2O=1 ： （0.4±0.05） ： 0.4-0.5. According to the formulation, mixed fertilizer was produced and extended 59 900 hm^2 through combined efforts of the agriculturai technology dissemination departments in Tianjin city and related counties （districts）, with the economic benefits more than 50 millions yuan.