| Application of mixture design in the experiment of combination of different kinds of N-fertilizer on hot pepper |
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| DOI：10.7606/j.issn.1000-7601.2008.05.10 |
| Key Words: hot pepper coated controlled-release urea mixture design N-fertilizer combination rate economic benefit |
| Author Name | Affiliation | | PANG Zhanqin | Huachi County Agri-technical extentation Center, Huachi, Gansu 745600, China | | WANG Xin | Department of Life Sciences, Longdong University, Qingyang, Gansu 745000, China | | XIAO Zhaoxia | Department of Life Sciences, Longdong University, Qingyang, Gansu 745000, China | | LIU Lingxia | Department of Life Sciences, Longdong University, Qingyang, Gansu 745000, China |
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| Abstract: |
| Field experiment was conducted to study the application of simplex centroid design in mixture experiment of combination of controlled-release urea and normal urea on hot pepper, and the pepper yield and its components are determined. Based on configuration of various factors to establish yield regression equation, effect and benefit of fertilizer application were analyzed. The results show that both the combined application of two kinds of controlled-release urea D30-D60 and the combined application of normal urea and controlled-release urea D30-D60 can increase the pepper yield by 24.40 t/hm-2 and 28.26 t/hm-2, with a increasing rate of 42.0% and 49.0% respectively compared to the application of single normal urea. The highest yield-increasing effect of the mixture of D30-D60 can get to a significant level of 20.88 t/hm-2. And the results of economic benefit analysis show that, with the nitrogen use efficiency as high as 60.1%, the profit per unit area of U-D30-D60 treatment is 24 400 yuan·hm-2. Therefore, mixed application of the normal urea and two kinds of controlled-release urea at a certain rate will benefit the increase of pepper yield and farmers' income. |
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