| Evaluation on the situation of fertilization and soil fertility in apple fields in Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2016.05.25 |
| Key Words: Shaanxi Province soil fertility rate of fertilizer application apple yield |
| Author Name | Affiliation | | YANG Yue | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | TONG Yan-an | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LU Yong-li | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LIN Wen | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | LIANG Ting | College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Lian-ying | Agricultural Bureau of Fuping County, Fuping, Shaanxi 711700, China |
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| Abstract: |
| In order to understand the current situation of fertilization and nutrients resource input problems for farmers in apple fields in Shaanxi Province, and to put forward countermeasures to solving these problems, household survey was used to evaluate the situation by collecting data from the project of soil testing and formulated fertilization from 2005 to 2009. 21 counties and 7141 households in total were included in this study. The results showed that the contents of soil organic matter, available nitrogen, available phosphorus and available potassium in Shaanxi were 12.6 g·kg-1, 56.9 mg·kg-1, 18.0 mg·kg-1 and 151.6 mg·kg-1, respectively. Compared with those in 1980s, the indexes were increased by 17.8%, 16.1%, 168.7% and 2.2%, respectively. This indicated that the situation of fertilization in apple fields had been improved. In addition, the application rates of chemical fertilizer from the Guanzhong irrigated area to the Loess plateau area of northern Shaanxi had decreasing trends. Overall, the current situation of household fertilization in apple fields in Shaanxi Province was that nitrogen fertilizer inputs were excessive, phosphate and potassium fertilizer inputs were reasonable or insufficient, and the yields of apple field from the Guanzhong irrigated area to the Loess plateau area had decreasing trends. The nitrogen and phosphorus surplus in Shaanxi were 196.5 kg·hm-2 and 205.5 kg·hm-2, respectively, but the potassium deficiency was 12 kg·hm-2. Therefore, increase of potassium fertilization should be concerned for households in Shaanxi Province. |
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