Evapotranspiration Measured by a Neutron Probe on Sudan Gezira Vertisols
Evapotranspiration Measured by a Neutron Probe on Sudan Gezira Vertisols
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用中子探针测量苏丹杰济拉变性土的蒸散量
DOI：
10.1017/s001447970000898x
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发表时间：
1978
影响因子：
1.6
通讯作者：
O. Fadl
中科院分区：
文献类型：
--
作者：
O. Fadl
通过中子探针对水分的每日测量显示，苏丹盖济拉的ET模式不稳定，这是由于水分的重新分布和干燥剖面中裂缝的发展。然而，将灌溉周期分为3-5天揭示了ET的独特趋势，即在早期始终较低，在中期增加到最大值，并在结束时下降。根遭受约5天的无氧条件后，洪水，但随后的干燥和开裂改善土壤通气，导致最终耗尽剖面水分和抑郁症的ET。
SUMMARY Daily measurements of moisture by neutron probe showed an erratic pattern of ET in the Sudan Gezira, attributed to the redistribution of water and development of cracks in a drying profile. However, dividing an irrigation cycle into periods of 3–5 days revealed a unique trend of ET that was consistently low in the early period, increased to a maximum in the middle, and fell off at the end. Roots suffer from anaerobic conditions for about 5 days after flooding but subsequent drying and cracking improves soil aeration that leads to final depletion of profile moisture and depression of ET.