| Effects of different nitrogen fertilizer levels on growth, yield, water and nitrogen use efficiency of cotton under non-sufficient drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2017.04.20 |
| Key Words: cotton nitrogen fertilizer irrigation amount growth characteristics yield |
| Author Name | Affiliation | | SHI Hong-liang | Xinjiang Agricultural University/Research Center of Cotton Engineering, Urumqi, Xinjiang 830052, China | | ZHANG Ju-song | Xinjiang Agricultural University/Research Center of Cotton Engineering, Urumqi, Xinjiang 830052, China | | YAN Qing-qing | Xinjiang Agricultural University/Research Center of Cotton Engineering, Urumqi, Xinjiang 830052, China | | TIAN Li-wen | Institute of Economic Crops,Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | CUI Jian-ping | Institute of Economic Crops,Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | LIN Tao | Institute of Economic Crops,Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | GUO Ren-song | Institute of Economic Crops,Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China |
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| Abstract: |
| The optimal amount of nitrogen fertilizer oncotton was investigated under the condition of non-sufficient drip irrigation to provide scientific basis for highly efficient use of water and fertilizer of cotton in arid regions. Xinluzhong 54 was used as test material in split plot experiment design, the total drip-irrigation amount of 2 800 m3·hm-2 (non full irrigation) and 3 800 m3·hm-2 (conventional drip irrigation) for the main plot, four nitrogen (N) level, N0 (0 kg·hm-2), N1 (150 kg·hm-2), N2 (300 kg·hm-2), N3 (450 kg·hm-2) for sub-plot. Results showed that with the same irrigation amount, the growth process prolonged significantly with the increase in nitrogen fertilization. The plant height, the number of main leaf and fruit spur increased with the increase in nitrogen fertilization. The fourth from top leaf width, and effective fruit spur number first increased and then decreased with the increase in nitrogen fertilization. With the same nitrogen fertilization, plant height increased,and the number of main leaf, the fourth from top leaf width, stem diameter slightly decreased with the increase indrip irrigation. The number of bud and boll, the accumulation amount of dry matter, time of duration and the maximum rate of accumulation of dry matter first increased and then decreased with the increase in nitrogen fertilization, which was more significantin N2, and the growth characteristic value was more coordinated in N2. The difference in single boll weight and lint yield between the two irrigation quantity was not significant, but single boll weight and lint yield first increased and then decreased with the increase in nitrogen fertilization. Those in N2 wasthe highest, 39.9%, 20.1% and 4.3 % higher than N0, N1, N3 respectively in average yield. Compared with N1 and N3,the water use efficiency increased by 40.97%, 19.02% and 4.88% respectively. The nitrogen utilization efficiency increased by 53.91% and 21.36% respectively compared with N1 and N3.Therefore, in the Nanjiang Akesu area, drip irrigation of 2 800 m3·hm-2, and 300 kg·hm-2 nitrogen fertilization was the optimal condition for cotton. |
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