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于2010年在新疆石河子大学节水灌溉实验站进行膜下微咸水滴灌试验。灌溉水矿化度为3.32 g L-1,三个灌溉定额处理(Q36:3 150 m3 hm-2、Q48:4 200 m3 hm-2、Q60:5 250 m3 hm-2),并分析了土壤盐分分布及其积累特征。在灌溉周期内土壤盐分运移特征为:根区土壤盐分基本表现趋势为湿润体形成阶段降低,再分布阶段聚集;根底土壤盐分表现趋势为湿润体形成阶段增加,再分布阶段降低。秋后土壤盐分剖面与盐量平衡结果显示:Q36、Q48处理中灌溉输入土壤的盐分基本上存于120 cm土壤以内,Q60处理在120 cm以下土壤盐分显著增加。灌前灌后土壤水分入渗剖面显示,三个处理滴灌后36 h土壤水分湿润深度分别达到80、90、120 cm。滴头部位水分携带盐分向深层迁移,在滴灌中起着深层淋溶作用,这对于减缓上层土壤盐分积累具有积极意义。
In 2010 in Shihezi University, water-saving irrigation experimental station for brackish water film drip irrigation test. The salinity of irrigation water was 3.32 g L -1, and the three irrigation treatments (Q36: 3 150 m3 hm-2, Q48: 4 200 m3 hm-2, Q60: 5 250 m3 hm-2) Salt distribution and its accumulation characteristics. The characteristics of soil salinity during the irrigation period were as follows: The basic trend of soil salinity in the root zone was that the wetting body was reduced and the redistribution stage was aggregated; the salinity performance of the base soil showed an increase in the wetting body formation stage and the redistribution stage. Results of soil salinity profile and salt balance after autumn showed that the salt content of soil input in Q36 and Q48 treatments was basically within 120 cm soil depth, while the soil salt content under Q60 treatment significantly increased under 120 cm. Soil water infiltration profile before irrigation shows that the depth of soil water humidification after 36 h of three treatments reaches 80, 90 and 120 cm respectively. Drip part of the water carrying salt to the deep migration, drip irrigation plays a deep leaching, which slow down the upper soil salinity accumulation has a positive meaning.