摘要
在西北半干旱雨养条件下,研究了15个现代春小麦品种间的降水利用效率、耗水量以及干物质积累与分配。结果表明,品种间的水分利用效率平均为7.8kg/(hm2.mm),品种间最高相差1.09倍;平均耗水量一般在240.5～308.5mm之间,最高相差28.3%。品种间开花前和开花后光合积累对籽粒贡献差异很大,花前储备对籽粒贡献平均为25%,但品种间差异较大(10%～49%);成熟期各器官干物质质量分数为:籽粒(42%)>茎秆+叶鞘+叶片(40%)>穗轴+颖壳(18%),但品种间差异较大,最大分别相差112%、63%和27%;品种间对土壤水分消耗差异较大,其中在生育时期上以分蘖期和180～200cm土层土壤含水率差异最大。
Fifteen experimental treatments were designed to study on water-use efficiency （WUE）, water consumption, dry matter accumulation （DMA） and distribution among 15 cultivars of spring wheat under the rain-fed conditions of semi-arid areas in Northwest of China. Results showed that the average WUE a- mong varieties was up to 7.8 kg/（hm2 mm）, and the highest was 1.09 times than the lowest The aver- age amount of water consumption among varieties ranged from 240.5 mm to 308.5 mm, and the difference between its maximum and minimum was 28.3%. There were significant differences of dry matter accumu- lation （DMA） and distribution at pre-flowering and post-flowering among fifteen varieties, and the contri- bution to grains was lower at pre-flowering stage than that at post-flowering stage, but the difference a- mong varieties for the former was 10%-49%. The proportions of dry matter distribution to different or- gans at maturity were as followed： grain （42%）〉stem＋sheath＋leaf （40%）〉spike axis＋glume （18%）, however, there was also difference in different organs, and the great differences of grain, stem＋sheath＋ leaf and spike axis＋glume among varieties were up to 112%, 63% and 27% respectively. Water consump- tions in different growth stages and soil layers were different, and the maximum difference appeared at till- ering stage and deeper soil layer of 180-200 cm.
出处
《灌溉排水学报》
CSCD
北大核心
2013年第3期54-58,共5页
Journal of Irrigation and Drainage
基金
公益性行业(农业)科研专项项目(200903010-06)
现代农业产业技术体系建设专项资金项目(CARS-3-2-49)
关键词
干物质积累与分配
水分利用效率
产量
春小麦
旱地
dry matter accumulation and distribution
water use efficiency
yield
spring wheat
rainfed farmland
