| Effects of drip irrigation on the growth, physiological characteristics and yield of summer soybean in North Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2016.01.09 |
| Key Words: drip irrigation quantities summer soybean growth physiological characteristics yield |
| Author Name | Affiliation | | PENG Jiang-long | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHANG Yong-qiang | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | WANG Na | Agricultural Technique Extension Center of Yining County, Yili, Xinjiang 835100, China | | LI Ya-jie | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | LI Da-ping | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | SU Li-li | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | HU Chun-hui | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | XU Wen-xiu | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| A field experiment was conducted in a summer soybean field of North Xinjiang with four drip irrigation conditions including W1(3 000 m3·hm-2), W2(3 600 m3·hm-2), W3(4 200 m3·hm-2), and W4(4 800 m3·hm-2) for investigations of leaf area index (LAI), leaf SPAD, net photosynthesis rate(Pn), transpiration rate(Tr), dry matter accumulation and water use efficiency (WUE). The results showed that both LAI and SPAD with different irrigations during the whole growth stage were in following order: W3＞W4＞W2＞W1. From flowering stage to graining stage, with the increase of irrigation, Pn, Tr and Gs were increased firstly, and then became decreased, whereas intercellular CO2 concentration (Ci) exhibited an opposite pattern. Dry matter accumulation showed an “S” curve. The duration of dry matter rapid accumulation (Δt), the maximum increase rate of dry matter (Vｍ) and the total dry matter accumulation were highest under W3. Also, the highest yield of 3 741.23 kg·hm-2 was under W3, which was 30.42%, 13.98% and 8.44% higher than that that under W1, W2 and W4(P<0.05), respectively. W1, W2 and W3 treatments resulted in no significant differences in WUE, which though was higher than W4. It was believed that the suitable drip irrigation quota was 4 200 m3·hm-2 for summer soybean in North Xinjiang. |
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