| Impacts of dosage of water-retaining agent on growth and water and fertilizer utilization of winter wheat |
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| DOI：10.7606/j.issn.1000-7601.2013.03.20 |
| Key Words: water-retaining agent winter wheat nitrogen fertilizer yield NUE WUE |
| Author Name | Affiliation | | YANG Yonghui | Insitute of Plant nuriuion & Resource Environment, Henan academy of agricultural sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Yuanyang, Henan 453514, China | | WU Jicheng | Insitute of Plant nuriuion & Resource Environment, Henan academy of agricultural sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Yuanyang, Henan 453514, China | | LI Zongjun | Tongxu lnstitute of Agriculture Sciences, Tongxu 475600, China | | LI Xuejun | Tongxu lnstitute of Agriculture Sciences, Tongxu 475600, China | | HE fang | Insitute of Plant nuriuion & Resource Environment, Henan academy of agricultural sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Yuanyang, Henan 453514, China | | HOU Zhanling | Xuchang Bureau of Agricultural Technology Extension,
Xuchang, Henan 461000, China | | YANG Xianming | Zhengzhou Jinrong Bio-technology Co., Ld, Zhengzhou,
Henan 450002, China |
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| Abstract: |
| order to investigate impacts of water-retaining agent on characteristics of growth and water and fertilizer utilization of winter wheat, different dosage of water-retaining agent(T3:30kg·km-2,T4:60kg·km-2,T5:90 kg·km-2)combined with nitrogen fertilizer(225kg·km-2)were tested on winter wheat in a field experiment. Winter wheat growth, soil available nitrogen, water and nitrogen fertilizer utilization were studied and no nitrogen and water-retaining agent(CK)usage was control. The results indieated that application of water-retaining agent and nitrogen fertilizer in-creased total group number, plant height, leaf area, soil available nitrogen, yield and WUE. The total group number, plant height, leaf area, ear length and grain number per panicle in T4 were higher in other treatments, and leaf area and 1 000 grain mass were increased most in T5. With
advancement of wheat growth period, root-shoot ratio of wheat was lower in water-retaining agent treatment than control, especially in T3. The order of average content of soil available ni-
trogen in various growth of wheat was as follows:T4>T3>T5>T2>control. With inerease of water-retaining agent dosage, wheat yield, nitrogen agronomic efficiency, nitrogen productivity
and water use efficiency were first increased and the reduced. All of these paramelers were increased most in T4. Compared to single nitrogen treatment(T2), they were increased by 14.5%, 55.9%, 34.6% and 25.0%, respectively. in conclusin, T4 had best effect on growth, yeid and water and fertilizer utilization of winter wheat compared with other treatrments. |
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