宁夏半干旱黄土丘陵区不同土地利用类型土壤贮水量变化分析

气候变化加剧了黄土丘陵区生态建设的严峻性,通过农地、林地、草地等土地利用类型0-20cm、20-100cm和20-180cm土壤贮水量的分析,研究得出：（1）不同土地利用类型土壤贮水量变化趋势相似,与降雨具有极大的相关性,都是在土壤解冻后下降,然后随着雨季的到来逐步升高,或者升高后在降低的趋势,主要以＂V＂型为主进行波...

Soil moisture storage of different land use types in Ningxia semi-arid loess hilly area

Ecological construction is exacerbated by climate change in Loess Hilly Area.Soil water storage of agricultural land,woodland and grassland were studied with soil layer 0-20cm,20-100cm and 20-180cm.The result showed that(1)The change trends of soil water storage for different land use types was similar,it has great relevance with rainfall,and decreased after soil thawing,and then gradually increased with the arrival of the rainy season,or decreased after the increase.It showed "V"-type trend.(2) A small amount of land disturbance could maintain a large amount of soil water storage.Soil water storage loss was relatively large on artificial plowing.Autumn crop growth and development adapted regional climate changes.(3)Site preparation for afforestation changed the small environment,and was conducive to the accumulation of soil moisture,there by facilitaty for afforestation.Pure Sea Buckthorn was not conducive to the resumption of regional ecological environment.(4) Alfalfa and natural grassland of slope with level trench soil water storage were higher than steep slope.(5)The regional rainfall levels could compensate for soil water consumption in soil layer 180cm.According to rainfall variation trend,we could take a variety of measures for saving water and controlling water,and improve the regional water use efficiency.