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近年,黑龙江省东部地区水稻乳熟期发生剑叶枯黄、叶尖枯死的早衰现象较为普遍,对水稻产量和品质产生很大的影响。近几年,在牡丹江地区稻田的调查表明,水稻大面积发生早衰,造成减产,给稻农造成严重的经济损失。在水稻成熟期进行预防,延长水稻功能叶的寿命,能起到十分可观的增产效果。因此,防治水稻早衰对粮农增产增收具有重要意义。1 水稻的早衰现象早衰有生理性早衰和病理性早衰两种。生理性早衰主要由水稻生长环境不良和品种自身特性所引起;病理性早衰主要由纹枯病、稻瘟病、小粒菌核病、稻飞虱等病虫害
In recent years, the premature decay of flag leaf withered and withered leaf tip occurred in the milky ripe stage of rice in eastern part of Heilongjiang Province, which had a great impact on the yield and quality of rice. In recent years, surveys of paddy fields in Mudanjiang have shown that premature aging occurs on large areas of rice, causing a decrease in production and causing serious economic losses to rice farmers. In the rice maturity to prevent and extend the life of rice functional leaves, can play a very impressive yield. Therefore, the prevention and treatment of premature aging of rice is of great significance to the increase of grain output and income. Premature aging phenomenon in rice Premature aging with physiological premature aging and pathological premature aging two. Physiological premature aging is mainly caused by the poor environment of rice growth and its own characteristics; the pathological premature senility is mainly caused by sheath blight, blast, schizophrenia, planthopper and other pests and diseases