论文部分内容阅读
我县部分社队实行稻草还田已有多年,取得了一定成效。为了总结这方面的经验,我们从79年开始,开展了稻草直接还田研究,兹将初步结果整理如下。材料和方法供试土壤为黄潮泥(长江冲积母质的渗育型水稻土),基本理化性状:有机质1.87％,全氮0.12％,速效磷20ppm,速效钾84ppm,<0.001mm粘粒9.47％,<0.01mm粘粒36.07％。土壤氧化还原电位系用pHS29A型酸度计,以针状白金电极测定,每区测五点,每点重复测五次,取平均数。田间试验均采用随机区组设计,小区面积为0.012亩,重复四次。有机质系用重铬
Some of the communes and communes in our county have been in the field for many years and have achieved some success. In order to summarize the experience in this field, we started the study on the direct straw return from 79 years old. We will summarize the preliminary results as follows. MATERIALS AND METHODS The test soil was yellow tide mud (infiltration paddy soil of alluvial parent material of the Yangtze River). The physical and chemical properties were as follows: organic matter 1.87%, total nitrogen 0.12%, available phosphorus 20ppm, available potassium 84ppm, <0.001mm clay 9.47% , <0.01mm cosmids 36.07%. Soil redox potential pHS29A type pH meter with acicular platinum electrode determination, each measured five points, each point repeated five times, take the average. Field trials were randomized block design, the plot area of 0.012 acres, repeated four times. Organic Matter with heavy chromium