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应用塑料薄膜育秧,是防止烂秧、培育壮苗的一项措施。它解决了早播增产与烂秧、死苗的矛盾,为避免春播期间周期性寒潮、低温的影响,适时早播早插,提高水稻、甘薯单位面积产量,开辟了有效的途径。但如何正确掌握小气候效应,充分发挥这项措施的优点,消除或减轻盖膜所引起的不利影响,则是薄膜育秧中的首要问题。要了解盖膜后究竟会引起哪些气象效应的变化及其变化规律,从而加以合理利用和改善,就必须进行小气候效应的观测。观测方法正确与否,直接影响到研究结果的准确性、代表性和可靠性。为此,特根据我们近几年试验研究中的一些体会,提出几点意见,供大家参考。
Application of plastic film Yang seedlings, is to prevent rotting seedlings, nurturing strong seedling a measure. It solves the contradiction between yield increase and rotten seedlings and dead seedlings in early spring planting. In order to avoid the influence of periodic cold wave and low temperature during spring sowing, it is an effective way to early sowing early planting and increasing yield per unit area of rice and sweet potato. However, how to correctly grasp the microclimate effect, give full play to the advantages of this measure, and eliminate or mitigate the adverse effects caused by the cover film are the primary problems in film seedling raising. It is necessary to understand the meteorological effects caused by the changes of the cover film and its changing rules, so as to reasonably utilize and improve, we must observe the microclimate effects. Whether the observation method is correct or not will directly affect the accuracy, representativeness and reliability of the research results. To this end, according to some of our experience in recent years, experimental studies, put forward a few comments for your reference.