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中国油料作物学报 ›› 2019, Vol. 41 ›› Issue (6): 825-.doi: 10.19802/j.issn.1007-9084.2019229

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Screening and preliminary application of rapeseed materials as green manure intercropped in tea plantations

  

  1. 1. Fujian Agriculture and Forestry University/ Root Biology Center, Fuzhou 350002, China;
     2. Oil Crops Research Institute, Chinese Academy of Agricultural Sciences /Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
  • Online:2019-12-28 Published:2019-12-20

Abstract: For better construction and promotion of tea-rapeseed intercropping mode in China, 23 rapeseed (Brassica napus L.) cultivars and lines were evaluated and screened for their adaptation to tea plantations as green manure in 2017-2018. Results showed differences among the blooming rapeseeds in plant biomass, plant height and nutrients return to field. After returning, soil pH, organic matter and alkaline N content were improved by most of the rapeseed as greenmanures. Among the 23 rapeseed materials, cultivar Yangguang 131, Shengguang 86 and Zhongshuang 11 had optimal value. They had the highest plant biomass (0.81-1.00 kg), returned the highest N (49.21~72.48 kg/hm2), P (12.64-17.40 kg/hm2) and K (33.64-56.29 kg/hm2), which could meet the demand for tea leaves. Furthermore, soil organics were improved obviously. Two other cultivars Dadi 69 and Youfei 1 had the poten? tial to intercrop with young or dwarf tea because of their short plant heights. By application of Yangguang 131 in 2 tea plantations with different ages of tea plants during 2018-2019, soil organic and pH were obviously improved af? ter green manure application. In summary, rapeseed cultivars were optimal as green manure in tea plantation. It could be expected for continual winter tea/rapeseed plantation and tea production in China.

Key words: Brassica napus L., tea plantation, intercropping, green manure, soil fertility