广东省东江流域中低产水稻土有机质状况及其提高试验研究

东江流域耕地资源较为丰富，但耕地质量差．土壤肥力的耗竭已严重限制了该地区农业的持续发展．本文以博罗县龙溪镇试验点为例，阐述了东江流域中低产水稻土的有机质状况，并就稻草在水稻上中的分地试验，研究和探讨稻草还田对提高土壤有机质的作用．结果表明，利用稻秆还田是防治地力衰退、更新和提高土壤有机质的有效途径。

Study on Organic Matter Status of Middle and Low Productive Paddy Soils and its increase in Dongjiang River Basin of Guangdong Province

The cropland resources are rich in quantity but poor in quality in Dongjiang River Basin. In this region, the exhaustion of soil fertility seriously affects the sustainable development of agriculture. This paper reports on the organic matter status of the middle and low productive paddy soils and the decay experiment of rice straw at Longqi, Bolo cunty in the basin. The results show that returning straw or stalks to the rice fields not only prevents and controns the degradation of land capability but also regradates and increases the soil organic matter.