The pear-dry rice intercropping ecosystem is a jumped-up agriculture pattern. Based on analyse of its biomass, vegetable nutrient contents and basic characteristics of soil, nutrient cycling, evaluation and its sustainability were studied.

梨树—旱稻间作复合生态系统是浙北山区新兴的一种生态农业模式，以其为研究对象，在系统生物量、植物养分含量、土壤基本状况分析的基础上，开展养分循环、评价及其可持续性研究，对深入了解该系统的结构和功能，科学地指导复合梨园的经营具有十分重要的意义。

Content of organic substance of corraded soil of Pear sweet potato is 13.38%,that of pear peanut is 13.41%,that of pear dry rice is 4.12% and that of bare pear orchard is 3.81%.

若以3次降雨的平均值IOmm计算，梨一红薯、梨一花生、梨一早稻和裸地梨园各处理的被侵蚀土壤有机物含量分别为13.38%、13.41%、4.12%和3.81%。