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湖南省在早稻育秧期间的气候特点是气温低,阴雨多,严重影响秧苗的正常生长与对养分的吸收。近年来许多研究资料说明,集中施用磷肥如沾秧根、点蔸等是南方稻田磷肥施用的较有效办法。但这些方法有一个明显的特点,即水稻移栽时才施用,而水稻秧苗早期(营养临界期)对磷却特别敏感。湖南省于1962年开始进行了秧田集中施用磷肥试验,结果表明,秧田施用磷肥有壮秧增产和防止或减少烂秧的效果。这一措施现已普遍采用,井取得了较好的效果。
The climate characteristics of Hunan during the period of early rice seedling raising are low temperature and heavy rain, which seriously affect the normal growth of seedlings and the absorption of nutrients. In recent years, many research data show that the use of concentrated phosphate fertilizer such as roots, spotting is the southern rice paddy more effective way. However, one of the obvious features of these methods is that rice is applied only when transplanted, whereas rice seedlings are particularly sensitive to phosphorus in the early stages (critical period of nutrition). Hunan Province in 1962 began to focus on the use of phosphate fertilizer in seedling experiments, the results show that seedling application of phosphorus seedling to increase production and prevent or reduce rotten seedling effect. This measure is now widely used and well achieved good results.