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青夹泥是我省第四纪红土母质上发育的水稻上,这种土壤乡分布在地势较低,地下水位高,排水不良的丘陵冲垅洼地。由于土壤长期渍水,水温泥温低,虽有机质可积累,但土壤粘化,土壤分散,通透性能差,青泥层厚,还原有毒物质多,氮、磷、钾有效养分含量较低,对水稻生育障碍极大,常年水稻亩产只有三、四百斤。为了改良这种潜育性水稻土,我们从1982年起,在长沙省朗木梨乡龙华村石子塘队的秧田垅,选择了历年低产的八丘青夹泥田,在施肥改土试验取得显著效果的基础上,进行了开沟改土的定位试验,现将1982-1985年的研究结果报告如下。
Qing Jia Nai is the Quaternary in our province on the development of red clay on the parent material, this soil is located in rural areas with low ground, high groundwater levels, poor drainage hilly Chong depression. Due to long-term soil waterlogging and low temperature water temperature, soil organic matter can accumulate, but soil sticks, the soil disperses, the permeability is poor, the green mud layer is thick, many toxic substances are reduced, the effective nutrient content of nitrogen, phosphorus and potassium is low, Obstacle to the great fertility of rice, perennial rice yield only three or four pounds. In order to improve this kind of gneissic paddy soils, we selected the low-yielding bachelors of the Qing dynasty in the seedling of Shitangtang, Longhua Village, Longmu Village, Longmu County, Changsha City since 1982, and achieved remarkable results in fertilization and soil improvement tests Based on the conduct of the positioning test of ditching and soil improvement, the results of the study from 1982 to 1985 are reported as follows.