砒砂岩对毛乌素沙地风沙土储水能力影响的研究

发布时间：2018-07-20 12:08

【摘要】：为探析砒砂岩对于风沙土储水能力的影响,在毛乌素沙地设置不同比例砒砂岩与沙复配成土试验小区(砒砂岩与沙的体积比分别为1∶1,1∶2,1∶5),进行单季玉米种植,并分别于2013—2015年连续3年对0—120cm深度内土壤水分进行动态监测。结果表明:从2013—2015年,适量砒砂岩的加入将风沙土储水量从100mm左右提升至200mm以上,并可逐步调节土壤水分至不亏缺状态,显著提升土壤的保水蓄水能力,有利于作物生长需求;土壤储水以40cm以下中深层土壤储水能力改善作用最为明显,且经多年种植,0—40cm和80—120cm土层逐步成为土壤水分较为稳定的土层,利于作物根系对水分的吸收利用;砒砂岩与沙1∶1~1∶5范围内,随砒砂岩所占比例提高,复配土储水特征的改善作用有增强趋势,但趋势不显著。
[Abstract]:In order to explore the effect of arsenite on the water storage capacity of wind-sand soil, in Maowusu sandy land, a test plot with different proportions of arsenite and sand was set up (the volume ratio of arsenite to sand was 1: 1 / 1 / 2: 1: 5) to plant corn in a single season. Dynamic monitoring of soil moisture in the depth of 0-120cm was carried out for three consecutive years from 2013 to 2015. The results showed that from 2013 to 2015, the amount of water stored in the sandy soil was increased from 100mm to 200mm, and the soil moisture content was adjusted to no deficit, and the water storage capacity of the soil was significantly improved. The effect of soil water storage was most obvious in the middle and deep soil layer below 40cm, and the soil layer of 0-40cm and 80-120cm gradually became the stable soil layer after many years of planting. In the range of 1: 1: 1: 5, the water storage characteristics of the mixed soil increased with the increase of the proportion of arsenopyrite, but the trend was not significant.
【作者单位】：陕西省土地工程建设集团有限责任公司;陕西地建土地工程技术研究院有限责任公司;国土资源部退化及未利用土地整治工程重点实验室;
【基金】：陕西省重点科技创新团队计划项目“退化及未利用土地整治创新团队”(2016KCT-23)
【分类号】：S152.7

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