寒地水稻秧田调酸技术研究

Study on Regulating p H Status in Seedbed of Cold Rice

合理的调控寒地水稻秧田苗床土p H值,不仅能抑制病菌的侵染,而且还能达到壮苗防病的目的。本试验针对黑龙江农垦建三江管理局的寒地水稻秧田育苗近年频发立枯病的现象展开了秧田调酸技术的研究。试验采用3种常用的调酸试剂,为了将苗床床土的p H控制在4.5~5.5的范围,分别定量3种不同类型调酸剂的用量及跟踪秧苗整个生育时期床土p H的变化情况,从而采取进一步的调酸措施。得出寒地水稻的苗床土需要在秧苗2叶期左右进行调酸,用p H在4左右的酸水进行浇苗能有效的控制苗床土的p H值,而且对秧苗不产生烧伤。

Reasonable regulation pH of seedbed soil not only can inhibit bacterial infection but also benefit to the growth of seedlings. This trial is based on a large area outbreak of Sheath Blight in Jiansanjiang reclamation of Heilongjiang province. The pH =4.5-5.5 is the suitable environment for the growth of seedlings of cold rice. This experiment used 3 different types acidulates to determine the doses and find their changing status with the change of time. The results indicated that the seedbed soil needs to be adjusted the pH at 2-leaf stage. The measurements of pouring acid water is a simple and efficient way to regulate pH values of seedbed. The pH values about 4 is reasonable.