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冷浸田、烂秧田都属于低肥力土壤,土性阴、冷、地下水位高,供肥能力差,而且很慢,作物全生育期肥劲不足,不易发苗,易发生僵苗现象,最终影响产量。 一、发生僵苗的原因 1.由于土壤有机质长期处于淹水状态,分解不彻底,硫化氢、甲烷等还原性产物多,对根系发育不利而形成僵苗。 2.土壤速效养分不足,特别是磷素缺乏,土温偏低,磷的吸收受阻,常使秧苗因缺磷而发生僵苗。
Cold dip fields, rotten seedling fields are all low-fertility soil, soil overcast, cold, high water table for poor fertility, and very slow, crop growth period less than fat, not easy to seedlings, prone to stiff seedling phenomenon eventually Affect the yield. First, the reasons for the emergence of stiff seedlings 1. Because of long-term soil organic matter in flooded state, decomposition is not complete, hydrogen sulfide, methane and other reductive products, the development of the root unfavorable formation of stiff seedlings. 2. Soil available nutrients, especially lack of phosphorus, soil temperature is low, the absorption of phosphorus blocked, often caused by lack of phosphorus seedlings stiff seedlings.