Soil Moisture Control Technology During Fallow Period of Farmland in Minqin OasisChinese Full Text
DING Lin;LUO Tian-feng;Gansu Research Institute for Water Conservancy;
Abstract: Using different farming and coverage methods,an experiment in farmland was conducted to determine soil moisture dynamic change regulation with TRIME-IPH and miniature micro-lysimeter soil moisture tester during fallow period.The advantage of different farming and coverage methods were compared with weather and other auxiliary data.The measured data were analyzed to learn the effect of different farming and coverage measures on soil water and precipitation utilization.It indicated that traditional farming model combined with cover measures could reduce surface soil evaporation and improve the utilization and conversion rate of natural rainfall.The soil moisture of suitable treatment for farmland surface（commune+ridging+ covering film,commune+ridging + covering grass and commune+flat+ covering film）increased by40.8%,31.3% and 29.7%in 20 cm before freezing compared with conventional treatment（commune）,the daily average evaporation decreased 0.36mm/d,0.20mm/d and 0.27mm/d respectively in leisure period,and the cumulative evaporation capacity decreaseed by 23.3%,15.0% and 24.1%.Among them the inhibition of evaporation processing effect for commune+flat+covering film is most significant.Considering the factors such as cover material collection,procurement cost,leisure farm uses the commune+ridging+covering film and commune+flat+ covering film are the suitable water control measures for in Minqin oasis.
Keywords：
farmland; leisure period; moisture control; precipitation utilization; water consumption; Minqin oasis;
- DOI：
10.13961/j.cnki.stbctb.2014.05.032
- Series：
- Subject：
- Classification Code：
S152.7
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