位山灌区冬小麦水肥方案优化  

Optimization of Water and Fertilizer Schemes for Winter Wheat in Weishan Irrigation Area

作　　者：李倩 徐立荣 魏帅 高海威 徐晶 LI Qian;XU Lirong;WEI Shuai;GAO Haiwei;XU Jing(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,Shandong,China)

机构地区：[1]济南大学水利与环境学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2022年第6期668-674,680,共8页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(42007153);山东省省级水利科研与技术推广项目(SDSLKY201803)。

摘　　要：以位山灌区监测的冬小麦品种泰农18号为例,采用农业技术转移决策支持系统模型进行参数校正和精度验证,模拟不同灌水量、施肥量组合的一系列水肥方案,计算分析不同水肥方案时冬小麦产量、氮肥偏生产力和水利用效率的变化特征,优化水肥方案。结果表明:水、肥之间存在明显的耦合效应;在不同施肥水平下,冬小麦产量和氮肥偏生产力随灌水量的增加呈先增后减的趋势,在灌水量为80 mm时达到最大值;在不同灌溉水平下,冬小麦产量和水利用效率随施肥量的增加而增大,当施肥量达到220 kg/hm~2后产量增幅变缓;综合考虑产量和水、肥利用效率,确定总灌水量240 mm、施肥量220 kg/hm~2为研究区最优水肥方案。Taking winter wheat Tainong 18 monitored in Weishan irrigation area as an example, decision support system for agrotechnology transfer model was used to finish parameter calibration and accuracy verification. A series of water and fertilizer schemes with different combinations of irrigation and fertilizing amount were simulated to compute and analyze variation characteristics of winter wheat yield, nitrogen fertilizer partial productivity, and water use efficiency with different water and fertilizer schemes for the purpose of optimizing the water and fertilizer schemes. The results show that there is obvious coupling effect between water and fertilizer. Under different fertilization levels, wheat yield and nitrogen fertilizer partial productivity increase first and then decrease with the increase of irrigation amount, reaching the maximum with irrigation amount of 80 mm. Under different irrigation levels, wheat yield and water use efficiency increase with the increase of fertilizing amount, and the yield increases more slowly after the fertilizing amount reaches 220 kg/hm~2. Considering the yield and the utilization efficiency of water and fertilizer, total irrigation amount of 240 mm and fertilizing amount of 220 kg/hm~2 are determined as the optimal water and fertilizer scheme in the research area.

关 键 词：冬小麦 水肥方案 农业技术转移决策支持系统 位山灌区 

分 类 号：S512.11[农业科学—作物学]