| The effects of different water and nitrogen treatments on the growth, yield and water consumption characteristics of winter wheat |
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| DOI：10.7606/j.issn.1000-7601.2018.04.18 |
| Key Words: wheat lower irrigation limit nitrogen rate growth yield water consumption |
| Author Name | Affiliation | | CHEN Kai-li | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | ZHAO Jing-hua | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | FU Qiu-ping | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | MA Ying-jie | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 | | WANG Zhong-ren | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052 |
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| Abstract: |
| Based on experimental data of wheat field with drip irrigation, different soil moisture (with lowest irrigation limit of 45%, 60% and 75% field capacity) and nitrogen treatments (45 kg·hm-2, 111 kg·hm-2, 146 kg·hm-2) were carried out to investigate the effect on the growth, yield and water consuming characteristics of winter wheat in the field. Results showed that, effect of the lower irrigation limit on plant height, leaf area index and dry matter of wheat was more significant than the effect of nitrogen rate. W3 (with lower irrigation limit of 45% field capacity) and N3 (with nitrogen rate of 45 kg·hm-2) treatments were not conducive to the increase of wheat plant height and leaf area. In the later stage of wheat growth, the increase of irrigation and nitrogen rate could be beneficial to the growth of wheat plant height. The yield of wheat increased with the increase of the lower irrigation limit.The yield of wheat increased with the increase of nitrogen rate when the nitrogen rate was at 0~111 kg·hm-2, but stopped increasing when it's more than 111 kg·hm-2 and even was inhibited. Treatment with relatively low irrigation lower limit and nitrogen rate was beneficial to improve wheat water use efficiency. For different water and fertilizer treatments, the wheat water consumption and water consumption mode were all behaved as filling stage > full ripe stage > heading and flowering stage > jointing-booting stage > green stage. Under the tested conditions, dry matter, yield and water use efficiency of wheat under W2N2(with lower irrigation limit being 60% of field capacity, irritation quota being 290 mm and nitrogen rate being 111 kg·hm-2) treatment was the best combination in respect of yield and benefit. |
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