【作者】 黄斌； 王劲松； 郭江勇； 张洪芬；

【Author】 HUANG Bin1,2, WANG Jin-song1, GUO Jiang-yong2, ZHANG Hongfen2 (1.Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Disaster Reduction, Lanzhou 730020; 2. Gansu Qingyang Meteorological Bureau, Gansu, Qingyang 745000)

【机构】 中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室； 甘肃省庆阳市气象局；

【摘要】 利用西峰黄土高原土壤水分含量和冬小麦千粒重资料,首先分析了0～200cm土层土壤水分的分布特征,再利用相关性统计的方法分析了不同深度土壤水分含量与冬小麦千粒重的相关关系,并对通过相关性检验的深度计算土壤水分的增产效应。结果表明:土壤水分垂直变化明显;时段不同,土壤水分对冬小麦影响的深度不同,3～5月,影响深度有逐渐下移的趋势,至5月份,100cm以下土壤水分对冬小麦千粒重的影响最为关键;进入7月份以后,土壤水分开始进入蓄墒阶段,7～11月的水分储备对下年冬小麦千粒重影响明显,特别是11月前后深层土壤水分储备量与下年冬小麦千粒重相关性显著。研究发现对冬小麦千粒重影响效果最好的是中下层土壤水分含量,并且愈到生育期后期,深层土壤水分含量所发挥的作用愈明显。这就表明了旱作农业区冬小麦对土壤水分的消耗规律,从而,我们在规划种植时更应该考虑深层土壤墒情。更多还原

【Abstract】 Based on of the data of soil moisture content and winter wheat 1000-grain weight on loess plateau in Xifeng, analyzed the 0 ~ 200cm layer soil moisture distribution characteristic at first, and use of relevant statistical methods, analyzed relationship between soil moisture content in different soil depth with the winter whea1000-grain weight, and calculated increase effects to through the relevant test of the depth of operators soil moisture. The results show that: Soil moisture vertical change significantly, in different stage, the depth is different of soil moisture influence the winter wheat 1000-grain weight, from March to May, the affecting depth gradually lower trend, to May following 100cm soil moisture on the winter wheat 1000-grain weight on the most critical. Entering July, soil moisture entered increase stage, in July to November of water reserves under the winter wheat1000-grain weight influence significantly, especially in November after deep soil moisture reserves and the relevance of the winter wheat 1000-grain weight significantly. The study found the effects of winter wheat is the best in the lower soil moisture content, and more to the late period of fertility, soil moisture content deeper role of the more obvious. This shows that the dry farming area of winter wheat consumption of soil moisture, thus, we in the planning should consider planting more deep soil moisture.更多还原