【摘要】 <正> 河北省柏各庄农垦区位于渤海湾北部,土壤盐渍化程度较高,经历年垦殖,引水洗盐已种植水稻。但全区30万亩水稻中有1/3出现不同程度的生理病害。水稻分蘖期叶片发生赤褐色斑点,植株萎缩,生长缓慢,分蘖很少,当地群众称为“稻缩苗”。近年来,我们与河北省农垦所协作,在有“稻缩苗”病害的土壤上进行了使用锌肥的试验,效果显著。每亩增产58.4—176.3斤,增产率为7.1—30.9%。更多还原

【Abstract】 In study of the "depauperated seedling" of paddy rice on the saline soils along Bohai Gulf, we have found that it is a special phenomenon of physiological disorder caused by zinc deficiency and poisoned by over uptake of iron.When the available zino of the soil is below 1.0 ppm or the zinc content of the plant is below 20 ppm,the rice seediing would show some "depauperation". Because of the deficiency of zinc, it has influenced the process of physiological metabolism of rice which caused an unproper ration of potash and nitrogen within the plant, and accumulated more iron, manganese, sodium and magnesium. When the content of iron in the plant is as high as 347.5 ppm, it effects toxicity.With the application of zinc fertilizer to increase the zinc content of the plant, it can effectively control the "depauperation" of the rice seedling. As a result, it also improves the functions of the physilogical metabolism, regulates the content of potash and nitrogen to a proper ration, represses over uptake of iron and manganese, thus maintaining the balance of elements within the rice plant.更多还原