为了将红壤低产稻田定向培育成高产稻田,我们于1976—1980年对红壤高产稻田的有机质状况及培肥增产途径进行了研究,现将主要研究结果综合整理如下: 一、高产稻田的有机质状况 我们在全所选择了稻谷亩产500—1100斤产量高低不同的11个田块,进行为期五年的观测,着重探讨对土壤有机质状况与稻谷产量的关系。观测结果指出(图1),红壤稻田在一般施肥及耕作管理的情况下,水稻产量与土壤有机质有密切相关的规律性:凡是亩产在900斤上下的田块,土壤有机质含量在3％左右,水稻产量与土壤有机质含量成正相关,水稻亩产 In order to redirect low-yielding rice fields into high-yielding rice fields, we studied the organic matter status of the high-yielding paddy fields from 1976 to 1980 and the ways of fertilization and yield increase. The main results are summarized as follows: First, the organic matter status of high yielding rice fields In the whole selected the rice yield of 500-1100 kg per mu yield of 11 different plots for a five-year observation, focusing on soil organic matter status and the relationship between rice yield. According to the observation results (Fig. 1), under the condition of general fertilization and tillage management, the yield of rice in paddy field is closely related to the organic matter in the soil. For any plots with a yield of 900 kg per mu, the content of soil organic matter is about 3% , Rice yield and soil organic matter content is positively related to rice mu produce