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紫泥翻硝田是四川省的低产稻田之一,面积很大,主要分布在川东条状山地的槽谷中及川南隆昌、泸县的一部分.大多由重庆层紫红色砂页岩形成,岩层多成水平排列.目前在利用上,几乎全部为一季中稻,冬水休闲.栽培水稻表现返青慢、发蔸迟、易坐蔸,从而影响了水稻前期分蘖和养分积累,穗子少而小,结果产量很低,一般亩产200—300斤.稻田脱水干板,速效磷显著降低,更加剧坐蔸危害,故群众有“一年干了板,三年搬不转”之谚.因此,改良紫泥翻硝田在农业上有重要意义.根据调查研究结果,基本明确紫泥翻硝田实质上属于瘦瘠类的低产田.引起水稻翻硝坐蔸的原因,主要是有效养分含量不足,特别是速效磷缺乏,质地粘重,结构不良(见表1,表2),土壤环境恶化,影响秧苗
Purple muddy dumpland is one of the low-yield paddy fields in Sichuan Province, with a large area and is mainly distributed in the trough valley in the strip-shaped mountainous area of eastern Sichuan and a part of Longchang and Lu County in southern Sichuan, mostly formed by the fuchsia purple sandstone shale, Almost into the horizontal arrangement.At present, almost all in the use of a mid-season rice, winter water leisure.Cultivated rice performance turn green, hair late, easy to sit up, thus affecting the rice early tillering and nutrient accumulation, fewer and smaller ears, the results The yield is very low, generally 200-300 kg per mu. Dry paddy rice dehydration, available phosphorus was significantly reduced, more drama worse, so the masses have “a year of dry board, three years do not move,” the saying. Therefore, the improvement Purple muddy paddy field is of great importance in agriculture.According to the results of the investigation, it is basically clear that the purebred paddy field belongs to the thin barren low-yielding field.The causes of paddy tillering are mainly due to insufficient effective nutrient content, In particular, available phosphorus deficiency, texture sticky, poor structure (see Table 1, Table 2), the soil environment deteriorates, affecting seedlings