Comparison of statistical models for predicting cost effective nitrogen rate at rice-wheat cropping systems
文献类型：期刊论文
| 作者 | Xia, Yongqiu; Yan, Xiaoyuan |
| 刊名 | SOIL SCIENCE AND PLANT NUTRITION
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 57期号:2页码:320-330 |
| 关键词 | statistical models cost effective rate (CER) environmental costs rice-wheat cropping systems |
| ISSN号 | 0038-0768 |
| DOI | 10.1080/00380768.2011.578259 |
| 通讯作者 | Yan, Xiaoyuan(yanxy@issas.ac.cn) |
| 英文摘要 | Due to increased economic and environmental concerns, developing statistical models of crop yield has become one of the most important steps in determination of the cost effective rates (CERs) of nitrogen (N) fertilization. Although quadratic models are commonly used to describe wheat and paddy rice yield response to fertilizer rates in the Taihu Lake region of China, few studies have investigated why this model is selected over others. This study evaluated quadratic, exponential and square root models describing the wheat (Triticum aestivum L.) and rice (Oryza sativa L.) yield response to N fertilizer when determining the CERs, while also considering the environmental costs of N losses. All models fit the data almost equally well when evaluated using the variability and standard error statistics. However, there were marked discrepancies among models when calculating the CER of fertilization and the economic returns form Z-test. The quadratic model had a greater CER value (194 kg N ha-1 for rice and 185 kg N ha-1 for wheat) averaged over all sites than the exponential and square root models. The residuals obtained from the quadratic models were closer to a normal distribution than those of the other two models, indicating a less systematic bias. The mean economic uncertainties resulting from the quadratic model were more dependable than the other two models evaluated. These results show that the quadratic model best describes the rice and wheat yield responses and tends to indicate the optimal rates of fertilization while considering the environmental and economic effects of over fertilization for rice and wheat in the Taihu Lake region. |
| 收录类别 | SCI |
| WOS关键词 | TAIHU LAKE REGION ; FERTILIZER RATES ; YIELD RESPONSE ; CHINA ; CORN |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Agriculture |
| WOS类目 | Plant Sciences ; Environmental Sciences ; Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000290969900016 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558914 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Yan, Xiaoyuan |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Yongqiu,Yan, Xiaoyuan. Comparison of statistical models for predicting cost effective nitrogen rate at rice-wheat cropping systems[J]. SOIL SCIENCE AND PLANT NUTRITION,2011,57(2):320-330. |
| APA | Xia, Yongqiu,&Yan, Xiaoyuan.(2011).Comparison of statistical models for predicting cost effective nitrogen rate at rice-wheat cropping systems.SOIL SCIENCE AND PLANT NUTRITION,57(2),320-330. |
| MLA | Xia, Yongqiu,et al."Comparison of statistical models for predicting cost effective nitrogen rate at rice-wheat cropping systems".SOIL SCIENCE AND PLANT NUTRITION 57.2(2011):320-330. |
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来源：南京土壤研究所
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