| Fertilization status and fertilizers reducing potential of spring rapeseed in low\|altitude areas of Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2020.01.06 |
| Key Words: spring rapeseed fertilization status potential of fertilizer rate reducing low altitude area of Qinghai Province |
| Author Name | Affiliation | | YUAN Jiudong | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | FU Rong | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | XU Tingting | Soil and Fertilizer Institute, Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, Qinhai 810016, China | | SONG Jia | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | XU Qian | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Yang | Soil and Fertilizer Institute, Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, Qinhai 810016, China | | ZHANG Rong | Soil and Fertilizer Institute, Academy of Agriculture and Forestry Sciences, Qinghai University, Xining, Qinhai 810016, China | | TIAN Hui | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | GAO Yajun | College of Natural Resource and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Plant Nutrition and Agri\|environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to clarify the production, fertilization status and fertilizer rate reducing potential of spring rapeseed in Qinghai Province, 451 farmer households were selected for door\|to\|door survey. Results showed that 47.7% of the households had more rapeseed yield than the average of 2005-2017 (1 674~2 158 kg·hm-2) while 44.6% of them had less yield than the average. About 20.4% of the households applied optimum dose of nitrogen fertilizer, 35.9% of them applied more than 160 kg·hm-2 N, while 43.7% of themused less than 120 kg·hm-2 N. About 17.5% of the farmer households applied moderate dose of phosphate fertilizer, 69.0% of themused more than 120 kg·hm-2 P, while 13.5% of them applied less than 90 kg·hm-2 P fertilizer. No potassium and micro\|nutrients fertilizers were applied in this area. 20.8% of the households applied organic fertilizer which was found to be at low dose. Few farmer households cultivated green manure. In short, both of excessive application and insufficient application of N fertilizer for spring rapeseed were found in the low\|altitude areas of Qinghai Province. Over dose of phosphate fertilizer was used by most farmer households. Other synthetic fertilizers and organic fertilizers were rarely applied. It can be seen that one\|third of the households could reduce N fertilizer rateand two\|thirds of the households could reduce P fertilizer rate for spring rapeseed. At least 20% of the households could decrease both of N and P fertilizer rate for spring rapeseed. In the meantime, soil fertility improvement of fields with low N fertilizer rate application for spring rapeseed should be concerned. Farmer household with low soil trace elements content are reminded to apply trace elements fertilizer. |
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