| 黄斌,张洪芬,强玉柱.西峰黄土高原作物生长期土壤水分损耗速率分析[J].干旱地区农业研究,2008,(1):241~245 |
| 西峰黄土高原作物生长期土壤水分损耗速率分析 |
| Analysis of the speed of soil moisture loss in the growth period of crops i n the Loess Plateau of Xifeng |
| |
| DOI：10.7606/j.issn.1000-7601.2008.01.45 |
| 中文关键词: 西峰 冬小麦 土壤 水分损耗 速率 |
| 英文关键词:Xifeng winter wheat soil moisture loss speed |
| 基金项目:庆阳市气象局科研专项(2005) |
|
| 摘要点击次数: 163 |
| 全文下载次数: 146 |
| 中文摘要: |
| 利用19892005年311月每月8日的0200 cm土壤总含水量资料及降水资料,分析冬小麦生长期土壤水分年际变化特征、特殊年型各层水分分布特点、土壤水分损耗速率以及水分损耗速率的影响因子。结果表明,土壤总含水量年际变化明显,20世纪90年代中后期为相对缺水期;丰水年、缺水年和平水年相同土层土壤含水量始终遵循丰水年≥平水年>缺水年。多年作物生长期内0200 cm土壤平均耗水速率为1.98 mm/d,最低为1.40 mm/d,最高为2.54 mm/d,最高耗水速率是最低的1.81倍;月水分损耗35月逐渐增大,5月为年度最大,其后开始持续减小;气候因子中年降水量对年土壤水分损耗速率的影响最为显著,通过0.001信度检验,达到极显著相关水平,冬小麦生长发育对土壤月耗水速率影响较大。 |
| 英文摘要: |
| Data of precipitation and total water content in 0～200 cm soil layer on the 8th day each month from March to November during 1989～2005 is used to analyze the characteristics of the change of annual average soil moisture content,the moisture distribution in every layer in special years,speed of soil moisture loss and its influencing factors in the growth period of winter wheat.The results show: The annual total soil water content changes obviously,and the middle and late 1990s is a period of water deficiency;The amount of annual soil water content in the same layer in the period of crop growth always presents an order of the year with abundant precipitation ≥ the year with normal precipitation>the year with deficient precipitation.For many years the average speed of soil moisture consumption in 0～200 cm soil layer is 1.98 mm/d,with a minimum of 1.40 mm/d and a maximum of 2.54 mm/d,and a difference of 1.81 times between the two;The monthly moisture loss increases gradually from March to May,with a maximum in May,thereafter it begins to reduce;The annual precipitation is the most prominent climate factor influencing the speed of annual soil moisture consumption,passing 0.001 reliable degree examination and reaching extremely prominent relevant levels,while the growth of winter wheat also has a great influence on monthly speed of soil water consumption. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |