| 李久生,饶敏杰.喷灌均匀系数对土壤水分及冬小麦产量影响的试验研究[J].水利学报,2000,31(1):0009-0015 |
| 喷灌均匀系数对土壤水分及冬小麦产量影响的试验研究 |
| Effects of sprinkler uniformity on spatial variability of soil moisture and winter wheat yield |
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| DOI： |
| 中文关键词: 喷灌 均匀系数 土壤水分 产量 空间结构 |
| 英文关键词: sprinkler irrigation uniformity coefficient soil moisture yield spatial structure |
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| 中文摘要: |
| 为了确定作物喷灌条件下灌水量和产量的空间结构及统计分布规律，定量评价喷灌均匀性对作物产量的影响，对冬小麦生育期内的冠层上、下喷灌水量、土壤水分、叶面积指数及产量的空间分布进行了监测。试验结果表明，在生育期内累计灌水量的相关距离约为5m，产量的相关距离为7--10m，但叶面积指数不存在空间结构。累计灌水量、叶面积指数和产量都可以用正态分布来表示。尽管在冬小麦灌溉季节内喷灌均匀系数变化于57%--89%，但土壤储水量均匀系数始终大于90%.喷灌均匀系数对作物产量的影响比预想的要小。 |
| 英文摘要: |
| Sprinkler water distributions both below and above the crop canopy, soil moisture, leaf area index and yield were measured during an irrgation season of winter wheat to determine their spatial structures and statistical functions. The experimental results demonstrate that the correlative ranges of cumulative water application during the irrigation season and crop yield are about 5m and 7～10m respectively. No spatial structure is found for leaf area index. Cumulative water application, leaf area index and crop yield can be represented by a normal distribtuion function. christiansen uniformity coefficients for water storage were always greater than 90% though the sprinker uniformities varied in the range of 57% to 89% during the irrigation season. |
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