The nutrient requirements by the crabs might be provided basically and the survival rate did not decrease obviously when they were fed every other day or more than 80% satiation.
当日投饵宁大于饱喂组的80％或隔天投喂足量饵料，则可基本满足蟹的摄食需求，对其群体的成活率没有明显的影响；
The increasement of double ears and the decrease of empty stalk were main reason for obtaining high yield because their agronomical characters did not obviously changed.
增产的主要贡献是双穗率提高，空秆率下降——每公顷有效穗数的增加。
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