论文部分内容阅读
灌溉是水稻田间管理中的一项重要措施.稻田灌溉通常有两种方法,一是经常有水层的灌溉法,一是水层、湿润、烤田相结合的灌溉法.盐碱地的稻田灌溉,宜用经常有水层的灌溉法.因为盐碱重,土壤贫瘠,渗透性强,昼夜温差大,故不宜落干水层,否则即受盐害,降低产量.具体的灌水法,应根据水稻不同生育期的生理需水、气候、土壤条件及田间管理措施来决定.一般说来,整个生育期的水层改换,可分为四个阶段,即播种至萌芽为深水
Irrigation is one of the important measures in paddy field management.It is usually got two ways to irrigate paddy fields, one is often the irrigation method of the aquifer, the other is the irrigation method combining the water layer, the wetting and the baking field.The irrigated paddy field in the saline- Should often use the method of irrigation of water because of heavy salt and soil, poor soil, strong permeability, large temperature difference between day and night, it should not fall into the water layer, or salt damage and reduce production. Specific irrigation method should be based on rice Physiological water demand at different growth stages, climate, soil conditions and field management measures to determine .Generally speaking, the water layer throughout the growing period of change, can be divided into four stages, namely, sowing to germination as deep water