苏南五种水稻土的肥力与作物的相互关系

不同类型的土壤具有各不相同的肥力,这对其上种植的各种作物产生不同的影响,最后构成不同的产量与品质.反过来,种植不同的作物也对土壤产生不同的影响.研究土壤与作物的这种相互关系是土壤肥力研究的重要内容,也是制定因土种植、合理利用和培养土壤的实际措施的重要依据.

THE FERTILITY OF FIVE PADDY SOILS IN RELATION TO THE GROWTH OF CROPS IN THE SOUTHERN PART OF JIANGSU PROVINCE

Studies on the interrelation between soil fertility and crop growth of five paddy soils collected from the southern part of Jiangsu province were conducted in pot egperiment.Rice,millet and soybean were used as first crop,each followed by bare-barley as the second crop,and the third crop was rice.The result obtained indicated that potential fertility of soils quite differed from their available fertility,and each soil had their own characteristics.Even though the yields of three crops were not alkali-hydrolyzable nitrogen,mineralizable nitrogen only correlated with total nitrogen,or available phosphorus content in soils,but also with the nitrogen content or phosphorus content extent,the results obtained were not significant statistically.in those plants to some Thus it seems that the yields of crops or nutrient composition of plants were determined by many factors.