摘要
我省红壤性水田约占全省稻田面积的65%,而亩产500斤以下的红壤性低产稻田,尚有600多万亩,影响了我省农业生产的发展。红壤性低产水稻土的主要缺陷是酸、瘦、板结。其主要形成原因是土壤缺乏有机质。为了做好红壤性低产田的改良工作,我们曾对红壤性稻田低产变高产和双季稻绿肥制土壤有机质年周期消长规律及其调节技术进行了研究。
This research has detected the relationship between rice yield and organic matter content of the paddy soil derived from the red earth.It showed that there exists a positive correlation when the low yield of rice increased to 400kg/mu,the soil organic matter content reached to 2.3%,and 2.5%or more as the rice yield was higher than 500 kg/mu.The Change tendency of soil organic matter content in the double rice-green manure system was increased in the early rice cropping,decreased to the utmost in the late rice cropping,and increased once more in the green manure cropping.The accumulation rate of organic matter in the higher fertile soil was slower than in the lower one.To crop mixedly with various species of green manure and fertilize with barnyard manure in order to adjustment the carbon-nitrogen ratio would not only increase the total organic matter content of the soil but also improve its humus quaIity and maintain a good relationship between nutrient accumulation and its distribution.
作者
赖庆旺
刘勋
丁贤茂
Lai Ching-wang;Liu Shion;Din Shen-mou(The Red Soil Research Institute of Kiangsi)
出处
《中国农业科学》
1979年第3期65-73,共9页
Scientia Agricultura Sinica
