| Study on the effect of plant growth regulators on dry matter accumul ation, yield and quality of cotton in Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2011.03.23 |
| Key Words: plant growth regulator dry matter accumulation cotton yield quality |
| Author Name | Affiliation | | DENG Zhong | College of Water Resources and Hydro-electric Engineering， Xi’an University of Technology，Xi'an, Shaanxi 710048，China
Farmland Irrigation Research Institute，Chinese Academy of Agricultural Sciences, Xinxiang， He’nan 453003，China | | BAI Dan | College of Water Resources and Hydro-electric Engineering， Xi’an University of Technology，Xi'an, Shaanxi 710048，China | | ZHAI Guoliang | College of Water Resources and Hydro-electric Engineering， Xi’an University of Technology，Xi'an, Shaanxi 710048，China
Farmland Irrigation Research Institute，Chinese Academy of Agricultural Sciences, Xinxiang， He’nan 453003，China | | ZHAO Hongshu | Hydrochina Guiyang Engineering Corporation, Guiyang ，Guizhou 550081，China | | FENG Junjie | College of Water Resources and Hydro-electric Engineering， Xi’an University of Technology，Xi'an, Shaanxi 710048，China
Farmland Irrigation Research Institute，Chinese Academy of Agricultural Sciences, Xinxiang， He’nan 453003，China | | HAN Qibiao | Farmland Irrigation Research Institute，Chinese Academy of Agricultural Sciences, Xinxiang， He’nan 453003，China | | ZHANG Wenzheng | Farmland Irrigation Research Institute，Chinese Academy of Agricultural Sciences, Xinxiang， He’nan 453003，China |
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| Abstract: |
| This paper, through experiment in farmland, studied the dry matter accumulation characteristics, quality
and yield of cotton affected by 3 different kinds of plant growth regulators as well as application methods. Four treatments were designed in the experiment : spraying DPC on leaf ，dripping PP333 with water, dripping rooting agent with water and mixed dripping PP333 and rooting agent with water . The results showed that the dry matter accumulation of cotton was in-creasing with growth stage extending and appeared“S”cuve. The dry matter accumulation rate changed as a single peak
curve and the peak value emeryed about 75 d after seed emeryence. The fast: growing period of total dry matter of shoot，stem and leaf dry matter and bud and boll dry matter were all advanced through the measures of mixed dripping PP333 and rooting agent，and had a long time of crucial period, effectively increased dry matter accumulation amount and rate, sig-nificantly improved boll number per plant and single boll weight of cotton, so the yield came to 6 941.13 kg/hm2，in-creasing respectively by 7.7%, 9.6% and 10.4% compared to rooting agent treatment，PP333 treatment and DPC treat-ment. Analyzing from the traits of cotton fiber quality, the micron value and lint button percent were increased under the measure of mixed dripping PP333 and rooting agent，specific breaking strength was also strengthened, and economic char-acters of cotton were availably perfected . The treatment of spaying DPC had the lowest effect on increasing dry matter ac-cumulation，yield and fiber quality of cotton. |
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