种植密度对慈抗杂3号生理与产量形成及纤维品质的影响

Effects of Plant Density on Physiological Characteristic,Yield Formation and Fiber Quality of the Hybrid Bt-cotton Cikangza 3

研究了种植密度对慈抗杂3号生理与产量形成及纤维品质的影响。结果表明,慈抗杂3号在2.8￣3.3万株.hm-2密度下,能较好地协调营养生长与生殖生长、个体生长与群体生长,使总桃数和皮棉产量达最高,且整个生育期N、P含量较高,棉株生长正常,高产潜力较大。种植密度显著影响前期花(8月30日)的纤维长度、比强度、纺纱均匀度指数及前期花和后期花的马克隆值,但对中期花(9月30日)、后期花(10月30日)无显著影响。

The study was carried out to investigate the effect of plant density on physiological characteristic, yield formation and fiber quality of the hybrid Bt-cotton Cikangza 3. The results showed that the reasonable plant density was 28000-33000 plants· hm^-2 under the condition of the present experiment. Under this density, it is beneficial to coordinate the vegetative and reproductive growth, and to attain the highest total boll number and lint yield of per unit area, and higher yield potential. Meanwhile, plants grew better with higher nitrogen and phosphate content during the whole growth stages than that of the other plant density. In addition, plant density significantly affected lint quality such as fiberlength, strength, and uniformity of the bolls formed during August 30-September 30, while no significant effect on the bolls formed after September 30, however, significant effect was observed in micronaire value of the bolls formed during August 30-September 30, and as well as after September 30.