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作者于1980年用早稻广陆矮4号和晚稻汕优6号分别以不同施钾量进行盆栽和大田试验。结果表明,亩施纯钾9斤即对水稻产量构成因素和产量有显著的促进作用,大田增产幅度为9.8—12.8％。施钾能促进稻株进行光合作用,合成较多的碳水化合物,并能促进碳水化合物转运和在谷粒中积累。施钾能使稻株不同部位的钾含量(干重％)提高,氮磷含量相对下降,钾氮比值也提高。钾氮比值的大小能反映稻株的营养状况,可作为施肥技术的一个参数。 本文通过水稻产量构成因素与主要生育时期稻株叶片钾含量之间的相关分析,初步阐明了它们之间的关系,并提出不同生育时期稻株叶片中正常钾的含量范围。
In 1980, we used potash and field experiments with different K application rates in early rice Guangluaai 4 and late rice Shanyou 6 respectively. The results showed that 9 kg Kushun pure potassium on rice yield components and yield have a significant role in promoting field yield increase of 9.8-12.8%. Potassium application can promote photosynthesis of rice plants, synthesize more carbohydrates, and promote carbohydrate transport and accumulation in grains. Potassium application increased potassium content (dry weight%) in different parts of rice plant, decreased relative N and P contents and increased K / N ratio. The ratio of potassium to nitrogen can reflect the nutritional status of rice plants and can be used as a parameter of fertilization technology. In this paper, the relationship between the components of rice yield and the potassium content of rice leaves during the main growth stages was preliminarily clarified, and the range of normal potassium content in leaves of rice plants at different growth stages was proposed.