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慈菇是本地重要的水生经济作物,随着早稻——慈菇的多年连作,由于长期缺乏有机肥料投入,加之生产上盲目大量偏施氮肥,致使近几年来慈菇生理性空心现象普遍发生.据定点调查,一般田块空心发生率达6.9%～14.4%,严重田块发生率达20%以上,直接影响了慈菇的食用价值、贮藏性能和生产效益.为探索慈菇生理性空心现象的发生规律和防治技术.近年来进行了广泛的调查、试验,现将其发生症状、发生原因及防治技术浅析如下:
Sagittaria indica is an important local aquatic cash crop. With long-term continuous cropping of early rice and Sagittaria indica, due to the long-term lack of input of organic fertilizers and the blind application of large amounts of nitrogen fertilizers in production, the physiological hollow phenomenon of Sagittaria giganteus has occurred in recent years. According to the fixed-point survey, the hollow incidence rate of general plots is 6.9% ~ 14.4% and the serious field incidence rate is over 20%, which directly affects the edible value, storage performance and production efficiency of Sagittaria indica L. In order to explore the physiological hollow phenomenon The occurrence of law and prevention and treatment technology.In recent years, conducted a wide range of investigations, tests, now its symptoms, causes and prevention and treatment of technology as follows: