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春旱不易保苗,是我省棉花生产上一大问题。近年来广泛采取的保全苗措施之一,就是加大播种量。由每亩用种3—5斤增加到15—20斤,甚至30斤。这种“以多取胜”的做法,不但浪费了大量的种子,而且,在旱年或涝年,由于种子过多,萌发时争水分,争氧气,呼吸排废量增多,使许多能发芽的种子“露嘴”后不上长或在土中霉烂,反而减少了应出的苗数。在气候和土壤环境
Spring drought difficult to seedlings, cotton production in our province is a big problem. In recent years, one of the measures taken to protect seedlings is to increase seeding rate. From 3-5 kg per acre with species increased to 15-20 pounds, or even 30 pounds. This kind of “win with many wins” not only wastes a lot of seeds, but also causes many seeds to germinate during drought or flood years due to excessive seeds, increasing water content during germination, Seeds “mouth” after not long or rotten in the soil, but reduced the number of seedlings should be made. In the climate and soil environment