Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (4): 657-663.DOI: 10.3969/j.issn.1000-2561.2019.04.005

• Crop Culture and Nutrition,Genetic Breeding • Previous Articles     Next Articles

The Impact on Soil Nutrient of the Tea-Walnut Intercropping

TIAN Hongmin1,LUO Meiling1,YANG Xuemei3,WANG Wei1,YANG Bin3,LI Jiahua1,*(),ZHAO Ping2,*()   

  1. 1. Longrun Pu-erh Tea College, Yunnan Agricultural University, Kunming, Yunnan 650201, China
    2. School of Resources and Environment, Yunnan Agricultural University, Kunming, Yunnan 650201, China
    3. Pu-erh Tea College, West Yunnan University of Applied Technology, Pu-erh, Yunnan 665000, China
  • Received:2018-07-21 Revised:2018-10-22 Online:2019-04-15 Published:2019-05-21
  • Contact: Jiahua LI,Ping ZHAO


The top 0-20 cm soil and the 20-40 cm soil with 1 m, 2 m and 3 m distance from walnut trunk of tea tree-walnut intercropping gardens aged 6 years, 10 years, 15 years and 30 years in Changning, Baoshan City were used to determine the soil pH, organic matter, alkali-hydro nitrogen, available phosphorus and available potassium, exchange of exchangeable calcium and magnesium content. The soil pH value of the intercropping tea garden increased with the extension of walnut tree planting time. The soil pH value of the walnut tree planted for 30 years was close to or greater than 7.0. The contents of soil organic matter, alkali-hydrolysis nitrogen and rapidly-available phosphorus in the intercropping tea garden with intercropping life of 30 years were significantly lower than those in the single-cropping tea garden. With the extension of intercropping years, the content of available potassium, exchangeable calcium and exchangeable magnesium in the intercropping tea garden was higher than that in the single-cropping tea garden. The above results indicate that walnut tree has obvious allelopathy inhibition on tea trees, which leads to the failure of tea tree growth and the decline of tea quality. Therefore, it is not suitable to have the two intercropped or use walnut trees as the shade trees to tea.

Key words: tea, walnut, intercropping patterns, soil nutrients