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- Title
Effects of fertilization on yield and nutrient uptake of direct - sowing oilseed rape in Guizhou Province.
- Authors
ZHANG Meng; WANG Yin; REN Tao; LI Xiao-kun; LI Ji-fu; CONG Ri-huan; CHEN Zheng-gang; ZHU Qing; LU Jian-wei
- Abstract
To investigate the nutrient limiting factors for a practical fertilization proposal on direct - sowing oilseed rape in Guizhou Province, fertilization field experiments were conducted using cultivar Youyan 599 (Brassica napus L.) in main rapeseed planting area of Guizhou during 2011 - 2012. Results showed that compared to no fertilization treatment (CK), seed yield of direct - sowing oilseed rape significantly increased when fertilizers were applied. Among them, NPKB treatment had the best performance with the average yield of 2189kg/hm². While compared to NPKB treatment, yield outputs decreased to 961, 342, 295 and 184kg/hm² in PKB (without N), NKB (without P), NPB (without K), and NPK (without B) treatments, respectively. It indicated that the nutrient limiting factors were ranked as N > P > K > B. Compared to farmers' fertilization practices (FFP ) treatment, NPKB treatment increased the application rate, but the production was improved significantly by 430kg/hm². Nutrient accumulation and fertilizer use efficiency were also significantly improved. Nitrogen, phosphorus and potassium nutrient accumulation (corresponding fertilizer use efficiency) increased 28.6 kg/hm² (13.5%), 9.6 kg/hm² (3.3%), 71.4 kg/hm² (23.9%) compared to FFP . As for economic profits, the revenue of NPKB treatment was increased by 1 109 yuan/hm2 compared to FFP. It suggested that the yield, nutrients accumulation and profits could be significantly improved by a combination of balanced fertilization.
- Publication
Chinese Journal of Oil Crop Sciences, 2014, Vol 36, Issue 3, p369
- ISSN
1007-9084
- Publication type
Article
- DOI
10.7505/j.issn.1007-9084.2014.03.012