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| DOI：10.13522/j.cnki.ggps.2017.0460 |
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| Efficacy of a Liquid Water-retaining Enhancer in Improving Growth and Yield of Winter Wheat |
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YU Le, QIE Zhihong, WU Xinmiao, RAN Yanli, CUI Xidong
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Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China； Hengshui Bureau for Hydrology and Water Resources Survey of Hebei Province, Hengshui 053000, China
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| Abstract: |
| 【Objective】 Drought is a common abiotic stress impacting agricultural production. Amending soil with water-retaining enhancers is a way to improve soil moisture and ameliorate water stress. 【Method】 A randomized experiment was conducted aiming to investigated the efficacy of amending soil with a liquid water-retaining enhancer (K2) to improve growth and yield of winter wheat in comparison with amendment with a solid water-retaining enhancer (K1) and no amendment (CK). The enhances were applied at 30 kg/km2 (C1), 60 kg/km2 (C2) and 90 kg/km2 (C3) respectively. During the experiment, we measured the plant height, leaf-area index and yield of the winter wheat. 【Result】①Amending the soil with the liquid water-retaining enhancer increased soil moisture, and thus the plant growth, by 13.6% and 2.6% respectively compared to CK and K1. ②After195 days, the leaf area index under K2+C1 and K2+C2 was significantly higher than those under K1+C3. In the two K2 treatments, the leaf area index increased with the chemical application and after 200 days, it was significantly higher than those under other treatments. ③ Compared with CK and K1, K2 increased the plant panicles by 8.7% and 14.6% respectively, and had an average yield of 11 973.2 kg/hm2, increasing by 22.3% and 13.6% respectively. The highest yield was 12 818.2 kg/hm2, achieved in K2+C3. 【Conclusion】 Amending soil with the liquid water-retaining enhancer noticeably improved the growth and yield of the winter wheat, and the optimal application rate in our experiments was 60 kg/hm2. |
| Key words: water-retaining enhancer; winter wheat; plant height; leaf area index; yield |
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