Screening of the New Varieties with Cruciferous Green Manure Suitable for Intercropping in Tea Gardens of Wuyi Mountain

In order to screen out new green manure varieties suitable for intercropping in the tea gardens of Wuyi Mountain, 19 cruciferous green manure varieties (strains) were selected for intercropping in the tea gardens of Wuyi Mountain from 2022 to 2023, and the growth period, biomass, nitrogen (N), phosphorus (P), and potassium (K) nutrient accumulation rates of these varieties were investigated. The results showed that: among the tested varieties (strains), there were nine green manure varieties (strains) with high fresh biomass and dry grass biomass, and strong NPK nutrients accumulation capabilities. These varieties (strains) including seven rapeseed (Brassica napus L.) cultivars（strains）were 557, Zhongyoufei No.1, Jinhuanghua, 21Q065, Zhonglvyou No.2, Zhongshuang No.11, and Yangguang 2009, respectively. And two rapeseed (Brassica juncea L.) varieties (strains) were Yuanjie 001 and Zijie J082, respectively. Other than that, there were two green manure varieties (strains), rapeseed (Brassia campestris L.) cultivar Zhonglvyou No.1, and radish (Raphanus sativus L.) strain RS007. They had short plant height, long flowering period, medium yield of fresh biomass and dry biomass, and relatively strong NPK nutrients accumulation capabilities. These above 11 green manure varieties (strains) had good regional adaptability and excellent comprehensive fertilizer traits. They were suitable for intercropping in the tea gardens of different tree ages in Wuyi Mountain to serve the construction of high-quality and efficient ecological tea gardens.