东北半湿润地区深埋秸秆周围土壤水分的动态变化  

Dynamic Change of Soil Moisture Around Buried Straw in the Northeast Semi-humid Region

作　　者：李波[1] 陈天助[1] 姚名泽[1] 丰雪[1] 

机构地区：[1]沈阳农业大学水利学院,沈阳110866

出　　处：《灌溉排水学报》2016年第9期51-55,共5页Journal of Irrigation and Drainage

基　　金：农业部公益性行业科研专项(201303125);辽宁省自然科学基金项目(2015020770)

摘　　要：为了探讨深埋秸秆周围土壤水分动态变化规律，通过田间小区对比试验，设置4个处理：秸秆无膜（S）、秸秆＋覆膜（S＋M）、无秸秆＋覆膜（M）和无秸秆无膜（CK），分析了不同处理条件下土壤水分的动态。结果表明，深埋秸秆可有效提高春播前0～30cm土层土壤含水率，比无秸秆的处理高0．03cm／cm2;深埋秸秆处理提高了土壤对雨水的拦蓄存储能力，降雨后随时间延长这种作用更加明显。强降雨132h后，S处理与s＋M处理各层土壤含水率差异不显著，S处理0～30、30~40、40～60cm土层土壤平均体积含水率比M处理提高了0．01、0．03、0．04cm3／cm3，比CK提高了O．02、0．05、0．05cm3／cm3；在长期干旱情况下，深埋秸秆处理具有更好的持续保墒效果．S处理与S＋M处理保墒效果差异不显著，S处理0～30、30~40、40～60cm土层土壤平均体积含水率比M处理提高了0．01、0．02、0．06cm3／cm3，比CK提高了0．02、0．05、0．09cm3／cm3。深埋秸秆提高了土壤的含水率，起到了蓄水、抗旱、保墒的作用。In order to explore soil moisture dynamic variation around the buried straw, a comparison test of field plot was conducted. There were four treatments which were buried straw （S）, buried straw and plastic mulch （S＋M）, plastic mulch（M） and no buried straw and plastic mulch（CK）. The dynamic changes of soil moisture were ana- lyzed under different treatments. The results showed that buried straw effectively increased the soil moisture in the layer 0 to 30 cm, and the soil moisture was 0.03 cm3/cm~ higher than CK; the rainwater storage capacity of soil was increased by buried straw. After raining, this effect was more obvious as time passing. 132 h after heavy rain, the soil moisture difference were not significant in each layer of S and S＋M treatment. Compared with M and CK, the average volume soil moisture in the soil layers of 0 to 30 cm, 30 to 40 cm, and 40 to 60 cm in the S treatment increased by 0.01 and 0.02 cm3/cm3, 0.03 and 0.05 cm3/cm3, 0.04 and 0.05 cm3/cm3 respectively. Under the long-term drought condition, buried straw was beneficial to soil moisture conservation. Soil moisture differ- ence of S and S＋M treatment was not significant. Compared with M and CK, the average volume soil moisture of the soil layers 0 to 30 cm, 30 to 40 cm, and 40 to 60 cm in the S treatment increased 0.01 and 0.02 cm3/cm3, 0.02 and 0.05 cm3/cm~, 0.06 and 0.09 cm3/cm3 respectively. Buried straw improved soil moisture and was beneficial to water storage, drought resisting, and soil moisture conservation.

关 键 词：深埋秸秆 覆膜 土壤水分动态变化 

分 类 号：S152.7[农业科学—土壤学]