果园覆草技术与效应据山东日照市科委报道，果园覆草取得了很好的经济效益，已在各地广泛推广应用。覆草效应分析如下：（１）培肥土壤，改良土壤结构。据试验，覆草３年后较清耕可提高土壤有机质１．３９％，Ｎ、Ｐ、Ｋ肥都有不同程度提高；（２）蓄水保墒，保持水土。据... Orchard grass mulching technology and effects According to the Shandong Rizhao Science and Technology Commission reported that orchard mulching achieved good economic benefits, has been widely promoted throughout. Grass cover effect analysis is as follows: (1) Fertilize soil, improve soil structure. According to the experiment, after 3 years of mulching, soil organic matter can be increased by 1.39% and N, P, K fertilizer all increased in different degrees; (2) Water storage and soil conservation, soil and water conservation. according to...