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过去,单季稻的大田生育期约有120天,浸水时间长,适时耘耥,除草松土,确是一项有效的增产措施。现在发展三熟制,改种了双季稻,土地耕翻次数多,本田生育期缩短,早稻仅二个月,耘稻虽然可以除草,但松土的作用已不如种单季稻时那样明显,而且还会伤苗伤根,抑制分蘖。文化大革命以
In the past, single-crop paddy field growth period of about 120 days, a long time immersion, timely Yun 耥, weeding loosening, is indeed an effective stimulation measures. Now the development of three-cropping system, replanting double cropping rice, land plowing more times, shortening the growth period of Honda, early rice only two months, although weed can weeding, but the role of loose soil as the single season rice as obvious, and Will hurt seedling injury root, inhibit tillering. Cultural Revolution