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一、引言绍兴县地处平原水网地带,土壤肥沃,灌溉方便,历年来以种植水稻为主。从1956年起,连作稻面积不断扩大,产量也不断跃进。但是生产上还有很多潜力可挖,例如减少瘪谷就可进一步大大提高连作晚稻的产量。水稻在不适宜的环境条件下,其幼穗分化过程、受精过程或种子发育的过程受到阻碍以致产生空壳现象,就称瘪谷。如果我们掌握其发生的原因和规律从而提出有效的防止措施,使瘪谷率降低到5%以下,据估计每亩可增产40—80斤,对增产粮食具有重大作用。
I. INTRODUCTION Shaoxing County is located in plain water network area, fertile soil, convenient irrigation, over the years to grow rice-based. Since 1956, the area of continuous cropping rice has been continuously expanding and the output has been continuously leaping forward. However, there are still many potentialities to be exploited in production. For example, reducing the number of flattened grains can greatly increase the production of continuous cropping late rice. Rice in unfavorable environmental conditions, the young spike differentiation process, fertilization process or seed development process is obstructed to produce shell phenomenon, called the deflated Valley. If we grasp the causes and laws of their occurrence and put forward effective preventive measures to reduce the rate of flattened valley to less than 5%, it is estimated that an increase of 40-80 kg per acre could play a significant role in increasing grain output.