山西农业大学学报（自然科学版）2017，Vol.37Issue(8)：547-552,556,7.
播期播量对旱地小麦土壤水分、干物质积累及产量的影响
Effects of sowing date and rate on soil water storage and dry weight accumulation and grain yield in dryland wheat
摘要
Abstract
[Objective]In order to study the effects of sowing date and rate on soil water storage, dry weight accumulation, and yield formation in dryland wheat and find out the optimum sowing date and rate.[Methods]Through regularly collecting in the field, testing and analyzing in lab, the field test was carried out to find out the effects of sowing date and rate on soil water storage, dry weight, yield and its components and water use efficiency of dryland wheat under sub-soiling condition in fallow period.[Results]The result showed that soil water storage at the depth of 0~300 cm of dryland wheat from wintering stage to booting stage were higher in D1R1, D2R2 and D3R3; The dry weight accumulation in pre-growth period decreased with the delay of sowing date and increased with the increase of sowing rate, and the highest dry weight was obtained under D2R2 in middle and late growth period; The spike number, grain number per number, yield and water use efficiency were higher in D1R1, D2R2 and D3R3 and yield were improved 6%~10%, 11%~20% and 5%~10% respectively. The analysis of correlation showed that soil water storage in pre-growth period was closely correlated with the dry weight from jointing stage to booting stage and the spike number and grain number per number; soil water storage in middle-growth period was closely correlated with the dry weight from jointing stage to booting stage and from anthesis to maturity, and was closely correlated with 1000-grain weight.[Conclusion]Early sowing date with the rate of 675 kg·hm-2, proper sowing date with the rate of 90 kg·hm-2 and late sowing date with the rate of 1125 kg·hm-2 could be suitable for the dryland wheat at the south of Shanxi Province, especially Oct.1 matching 90 kg·hm-2 could improve yield and water use efficiency.关键词
旱地小麦/播期播量/土壤水分/干物质量/产量Key words
Dryland wheat/Sowing date and rate/Soil water storage/Dry weight/Yield分类
农业科技引用本文复制引用
薛玲珠,孙敏,高志强,任爱霞,雷妙妙,杨珍平..播期播量对旱地小麦土壤水分、干物质积累及产量的影响[J].山西农业大学学报（自然科学版）,2017,37(8):547-552,556,7.基金项目
国家现代农业产业技术体系建设专项经费(CARS-03-01-24)、国家公益性行业(农业)科研专项(201303104)、山西省科技攻关项目(20140311008-3)、山西省科技创新团队项目(201605D131041)、山西省回国留学人员重点科研资助项目(2015-重点4) （CARS-03-01-24）
