西山坪地处低背斜山岭浅丘区,海拔500米左右。土壤为黄色砂岩风化发育成的酸性黄壤,pH值为5—5.5,土壤含有效磷钾低,有机质贫乏,保水保肥能力弱。故采用地膜覆盖栽培西瓜,有特殊的作用。西瓜原产非洲,特别喜好高温,覆盖地膜后,改善了温度及其相应条件,给西瓜创造了良好的生态环境,因而生长发育加快,开花结果提早,在产量产值上都出现大幅度增长。西山坪为重庆西瓜主要产区之一,由于西瓜栽培技术性强,病虫害多,产量极不稳定,常年亩产多停滞在2,000斤左右的低产状态,有的年份还大大低于这个水平。采用地膜覆盖栽培后,生产大为改观,亩产达4,414.95斤,较 Xishanping is located in a low-berth area of ​​shallow hill, about 500 meters above sea level. Soil yellow sandstone weathering developed into acidic yellow soil, pH value of 5-5.5, the soil contains low available phosphorus and potassium, organic matter is poor, water and fertilizer is weak. Therefore, the use of mulching cultivation of watermelon, a special role. Watermelon originated in Africa, especially like high temperature, covering the film, to improve the temperature and its corresponding conditions, to create a good watermelon ecological environment, so growth and development accelerated, early flowering results in the output and output have shown a substantial increase. Xishanping is one of the major producing areas of Chongqing watermelon. Due to the strong technicality of watermelon cultivation, the large number of pests and diseases and the extremely unstable output, perennial mu production stagnates at a low yield of about 2,000 kg, and some of the years are still far below this level. After mulching cultivation, the production greatly improved, yielding 4,414.95 kg, more