| 丘四区旱地土壤水分动态变化特征 |
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| 引用本文： | 徐尚辉,陈武生.丘四区旱地土壤水分动态变化特征[J].青海农林科技,2009(1):30-32. |
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| 作者姓名： | 徐尚辉 陈武生 |
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| 作者单位： | 1. 互助县水土保持工作站,青海互助,810500
2. 青海省农林科学院林业所,青海西宁,810016 |
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| 摘 要： | 湟水流域黄土丘陵沟壑区旱地土壤水分动态变化有如下特征：1.土壤入渗快,蒸发快,雨季时土壤湿度迅速增高,雨季过后土壤湿度骤降,即使在丰水年,到11月底,雨季降水已基本损失殆尽,土壤在经过四个阶段的循环后,开春时其湿度仍保持在田间稳定湿度左右;2.降水与蒸发同步,降水量最大的时段,正是蒸发强度最大的时段,3土壤蒸发时,水分整体移动性较强,在旱季0-2 m土层上下之间土壤湿度无明显差异,土壤湿度剖面比较统一;4、作物耗水绝大部份或全部来自生育期降水,土壤对生育期内降水起调节和再分配作用。
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| 关 键 词： | 干旱 土壤 水分动态 变化 |
Characters on Moisture Trends Changes in Dry Land Soil Qiusi Region |
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| XU Shang-hui,CHEN Wu-sheng.Characters on Moisture Trends Changes in Dry Land Soil Qiusi Region[J].Science and Technology of Qinghai Agriculture and Forestry,2009(1):30-32. |
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| Authors: | XU Shang-hui CHEN Wu-sheng |
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| Institution: | XU Shang-hui, CHEN Wu-sheng( 1. Huzhu Water and Soil Conservation Management Station, Huzhu Qinghai 810500, China 2. Qinghai Academy of Agriculture and Forestry, Xining Qinghai 810016, China) |
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| Abstract: | The moisture trends changes of soil was determined in dry land Qiusi. The results showed that they are synchronization between precipitation and evaporation capacity. There are characters of precipitation water and redistribution in soil moisture trends changes during growth season. |
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| Keywords: | Dry land Soil Moisture trends Changes regulate |
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