不同灌水条件下宁夏贺兰山东麓滴灌酿酒葡萄土壤含水率变化规律研究

Study on the Change of Soil Moisture Content of the Trickle Irrigation Wine Vineland in Donglu of Helan Mountain in Ningxia Under Different Irrigation Conditions

以宁夏贺兰山东麓大田滴灌酿酒葡萄为研究对象,分析不同灌水处理条件下土壤含水率的变化规律。主要结论有:不同灌水处理生育期土壤含水率灌水后均得到显著提高,总体随土层深度呈下降趋势。0~20cm和20~40cm 2个土层土壤含水率较高,围绕60%田间持水率变化;40~60cm和60~80cm 2个土层土壤含水率较低,基本在60%田间持水率以下。生育期内不同深度土壤平均含水率变化趋势相似,其中0~20cm受地表蒸发、降雨等因素影响,土壤含水率变幅较大;0~40cm由于试验区特殊的土壤结构,使得该层成为主要的贮水层。0~60cm土层土壤含水率平均值显著低于0~40cm;0~80cm各处理土壤含水率基本呈现灌水后陡增,随着生育期的推移逐渐降低的趋势,土壤含水率增加值基本与灌水定额的大小保持一致。

Taking the drip irrigation wine vineland of Donglu field of Helan Mountain in Ningxia as the research object, paper analyzes the change of soil moisture content under different water treatment. The main conclusions are： the soil moisture content were significantly improved after irrigation in different water irrigation growth period, and the whole trend of soil moisture content is decline with the soil depth. The two layers of 0-20 cm and 20-40 cm, their soil moisture content are higher, they are change with 60% of the field capacity, and another two layers of40 -60 cm and 60-80 cm, their soil moisture content are lower, basically under 60%. In the growth period, the change trend of soil moisture content of different depth soil are similar, in them, the 0-20 cm layer change more, as the effect of ground surface evaporation and rain etc., the0-40 cm layer is the main storage layer as its special soil structure in this test area, the average soil moisture content of 0-60 cm layer is significance low than the 0-40 cm layer, the 0-80 cm layer, its soil moisture content shows a trend of sudden increase after irrigation and gradually lower with the growth period, the increment of soil moisture content is the same with the size of irrigation quota.