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六十年代开始的水稻塑料薄膜保温育苗,虽能充分利用早春光、热资源,但床内温度变化剧烈,而且很不均匀。往往是床中部高温处通风降温不彻底,造成秧苗徒长;而床底侧开口附近的秧苗又直接受冷空气侵袭,导致生理机制发生一定程度的障碍成为“小老秧”。而且常因温度忽高忽低引起秧苗病变。甚而管理不善,毁于一旦。针对上述问题,1983年春,我们进行了塑料薄膜纱网启闭式(规格:长11米,宽2.2米,中间纱网宽0.8米,薄膜“天窗”盖宽1米。)保温育苗试验。现将83年4月初-5月初薄膜纱网启闭式苗床(见图)与普
Rice plastic film insulation and seedling raising started in the 1960s can make full use of early spring light and heat resources, but the temperature in the bed varies dramatically and is very uneven. Often the ventilation in middle of the bed is not well ventilated and cooled down, resulting in the growth of the seedlings. The seedlings near the bottom of the bed are directly affected by the cold air, leading to a certain degree of obstacle in the physiological mechanism to become the “small old seedling.” And often due to temperature fluctuations caused by seedling disease. Even poorly managed and destroyed. In response to the above problems, we conducted a plastic film gauze opening and closing type (specifications: 11 meters in length and 2.2 meters in width, 0.8 meters wide in the middle gauze, and 1 meter wide in the “skylight” cover) in the spring of 1983. Now 83 early April early May - early opening and closing of membrane gauze seedbed (see photo) and Cape