摘要
水稻是一种喜温作物，但寒地种植恰恰遇到温度不足的矛盾，因而长期以来，温度成为寒地发展水稻的主要障碍因子，因此如何采用有效的科学的增温办法，就能在一定程度上克服或减轻因温度低而对水稻产生的影响，通过反复探讨研究我们认为改常规的双膜覆盖育苗为三膜覆盖育苗，能有效地提高温度。研究结果表明：三膜覆盖育苗能够保温增温，提早育苗，三膜覆盖育苗比双膜覆盖育苗增产１５２４．８ｋｇ／ｈｍ２，增产１９．２％，减去育苗多投入的２２５元／ｈｍ２的成本，三膜覆盖育苗比双膜覆盖纯增效益１９０９．７２元／ｈｍ２。
High Yield of rice needs high accumulated temperature (≥10℃). But in northern part of china there is often not enough efficient temperature for high yield of rice. Therefore We have been looking for a method to increase the temperature during the period of raising rice seedlings. 'Three layers of plastic film for raising rice seellings' is a better method (two layers to make duble plastic shed and one layer as a isolated layer beneath the Seedlings bed) than 'two layers of plastic film' (one to make plastic shed and one as a isolated layer.). The results of the experiments show that: 'Three layers of plastic film' can increase temperature, make seedling raising edlier and increase output of rice, 1 524.8 kg/hm 2 higher than that of ' two layers of plastic film'. It would take 225 yuan RMB/hm 2 more, but it would make 1 909.72 yuan/hm 2 more. So, using 'three layers of plastic film for raising rice seedlings' is a very important method to increase output of rice.
出处
《黑龙江农业科学》
1997年第4期8-11,共4页
Heilongjiang Agricultural Sciences
关键词
三膜覆盖
增温
育苗
增产
水稻
Three Layers of plastic film, Increasing temperature, Raising seedlings,Increasing yield,Rice
