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一、稻田水层的作用 水是组成水稻机体的主要成分和生理活动所必需的物质。稻田建立水层的重要作用在于: 1.水分充满耕层土壤空隙,造成嫌气条件,有利于铵态氮的积累,能提高含磷、硅、铁、锰等元素化合物的溶解度,改善水稻营养条件。 2.用水层保持和调节水温、地温及田面湿度,控制稻田杂草为害。 3.盐碱地可以利用水层淋洗盐碱,排除土壤盐分。 稻田水层有两重性。在某一生育时期,有利于水稻生育;在另一生育时期则可能变成不利于水稻生育的因素。如在缓苗期,有水层能加速缓苗
First, the role of paddy water layer Water is the main component of rice body composition and physical activity of the necessary substances. The important role of water layer in paddy field establishment lies in: 1. Water is filled in soil layer of topsoil, resulting in anaerobic condition, which is beneficial to the accumulation of ammonium nitrogen, can increase the solubility of phosphorus, silicon, iron, manganese and other elements compounds, improve rice nutrition condition. 2. The water layer to maintain and adjust the water temperature, ground temperature and surface humidity, control weeds infestation. 3. Saline can use the water leaching salt, alkali soil exclusion. Paddy water has dual nature. In a certain period of growth, it is conducive to rice growth; in another growth stage may become a factor that adversely affects the growth of rice. As in Huanmiao period, an aquaculture can accelerate Huanmiao