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一、返青期诊断:诊断返青好坏的一般方法:第一,注意观察栽秧后的凋萎程度。凋萎程度越大,返青越迟。第二,栽秧后3—5日拔取具有代表性的稻株,把根洗干净,数发生的新根数。新根数越多,返青越好。第三,栽秧后7—10天调查20穴的新生分蘖数。新生分蘖数越多,返青越好。二、分蘖期的诊断:调查栽秧后第20天或者第15天的茎数作为产量诊断是重要的。茎数和穗数有密切关系的时期是最高分蘖期,从该期的茎数能相当正确地预知穗数。最高分蘖期后一周左右,调查具有二片半绿叶的分蘖数或者相当主秆
First, the greenback diagnosis: greenback diagnosis of the general method of good or bad: First, pay attention to observe the level of withered after planting. The greater the degree of wilting, the late return green. Second, 3 to 5 days after planting seedlings to take a representative of rice plants, the root wash clean, the number of new roots occurred. The more new roots, the better return. Third, 7-10 days after planting, 20 newborn tillers were investigated. The more the number of newborn tillers, greening the better. Second, the diagnosis of tillering stage: Investigate the number of stems 20 days after planting or 15 days as a yield diagnosis is important. The number of stems and panicles is closely related to the period of the highest tillering stage, stems from the period can be quite correctly predict the number of spikes. One week after the highest tillering stage, the number of tillers with two half-green leaves or equivalent stems