欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
【目的】研究不同耕作方式下常规尿素与控释尿素对不同玉米品种籽粒灌浆速率、产量和水分利用效率的影响。【方法】试验采用裂区设计,以不施氮为对照,设置耕作方式为主区（旋茬处理和旋茬后再深松处理）;品种为副主区（郑单958和登海3号）;尿素类型为副区（常规尿素和控释尿素,用量均为225 kg N.hm-2）。【结果】相同耕作方式、施氮水平和品种条件下,与常规尿素相比,控释尿素处理0—100 cm土层含水量在玉米小喇叭口期较高,而收获期较低,实现了土壤水分的时空高效利用;控释尿素处理的玉米籽粒灌浆速率、水分利用效率均显著提高。深松可显著提高玉米水分利用效率和产量。与郑单958相比,登海3号有较高的籽粒灌浆速率、产量和水分利用效率。控释尿素、深松和品种间有明显的正耦合效应,利于旱作高产。【结论】土壤水分的时空高效利用和较高的灌浆速率是玉米产量和水分利用效率提高的重要原因。因此,在半湿润玉米种植区,选用适宜品种、施用控释尿素并结合深松,可以更好地调控土壤的水分供应状况,实现土壤水分供应与作物需水的时空吻合。
英文摘要：
【Objective】The objective of this study was to understand the effects of normal urea and controlled release urea on grain filling rate,yield and water use efficiency of different maize cultivars under different tillage modes.【Method】 Three sets of treatments were arranged in a split-split plot design.The whole-plot treatment factor was the tillage mode,stubble ploughing or subsoiling after stubble ploughing.The subplot treatment factor was maize cultivars Zhengdan 958 and Denghai 3.The sub-subplot treatment factor was the nitrogen level,including applied with 225 kg N？hm-2 normal urea,applied with 225 kg N？hm-2 controlled release urea,and no nitrogen fertilizer used as control.【Result】 At the same tillage mode,nitrogen level and maize cultivars,the soil water content in 0-100 cm soil layer applied with controlled release urea was higher at pre-tasselling stage,while lower at maturity stage than those applied with normal urea.It indicated that treatment applied with controlled release urea could realize higher use of soil water through time and space,and as a result increased the gain filling rate and water use efficiency.Subsoiling after stubble ploughing could also increase the grain filling rate and water use efficiency.Compared with Zhengdan 958,Denghai 3 had higher grain filling rate,yield and water use efficiency.And these were positive coupling effects between urea type,subsoiling,and maize cultivars,which was benefit for higher yield in dryland farm.【Conclusion】 Higher use of soil water through time and space and higher grain filling rate were the important reasons for higher yield and water use efficiency.Using suitable maize cultivars and applying controlled release urea,with subsoiling after stubble ploughing,could make the good use of soil water,and realize the space-time coincide between soil water supply and crop needs,which will be the important measures to achieve higher grain yield and higher benefit in semi-humid region of China.
同期刊论文项目
同项目期刊论文
Coupling effects of urea types and subsoiling on nitrogen-water use and yield of different varieties
Coupling Effects of Irrigation and Phosphorus Fertilizer Applications on Phosphorus Uptake and Use E
Responses of photosynthesis, chlorophyll fluorescence and grain yield of maize (Zea mays L.) to cont
Effects of urea types and irrigation on crop uptake, soil residual, and loss of nitrogen in maize fi
Nitrogen uptake, biomass yield and quality of intercropped spring- and summer-sown maize at differen
期刊信息
位置：