陕西礼泉苹果林地和麦地土壤含水量研究

根据对陕西礼泉县城郊苹果林和小麦地含水量的测定,研究了不同土地利用方式下土壤含水量的差异。结果表明,礼泉10龄和10龄以上苹果林地土层含水量较低,2m以下土层含水量一般低于12%,发育了长期性轻度土壤干层;麦地平均含水量普遍较高,没有土壤干层发育,但春季2m以上的土层含水量较低,有季节性干层发育。苹果树的种植造成了土层含水量明显降低,表明研究地区的降水量对苹果林的生长有一定的制约,可通过减少果树种植密度、增大行间距、适度溉频等途径减少苹果林地土壤干层可能带来的不利影响。在降水少的情况下需要及时对麦地采取灌溉措施,减少季节性干层造成的损失。

Research on Soil Moisture Content under Apple Trees and Farmland of Liquan in Shaanxi

Based on the determination of moisture content of apple forests and wheat in the suburban Liquan Countyof Shaanxi,the different soil moisture under difference land use patterns were studied.The results showed that 10 age and above Apple woodland soil moisture content lower than 2 meters of soil moisture content were generally lower than 12%,developed a long-term mild dried soil layer;There was no dry-layer of soil development and the average moisture content was generally higher in wheat land,but in the spring soil moisture content of more than 2 meters lower dry-layer of seasonal growth.Cultivation of apple trees resulted in significantly lower soil moisture content,indicating that the study area of the precipitation on the growth of Apple's forests had some constraints.Planting fruit trees by reducing the density,increasing the line spacing,appropriate irrigation and other ways to reduce the frequency of forest soil dry layer of apples may bring adverse effects.In the case of low rainfall,the timely irrigation of wheat was needed to reduce the losses caused by seasonal dry layer.