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Abstract In order to solve the problem of weed control and soil fertility in tea plantations, the ecological cycling pattern effects of sawdust-covered sawdust and intercropping crops were studied preliminarily. The survey found that there were 46 families of 26 species in the tea plantation; the main weeds were Digitaria sanguinalis (L.) Scop., Ageratum conyzoides L., Conyza canadensi (L.) Cronq., Paspalum paspaloides (Michx.) Scribn., Crassocephalum crepidioides (Benth.) S. Moore. The effects of weeds control and soil fertilization in tea plantation were discussed by covering sawdust, intercropping of ryegrass, broad bean, pea and covered sawdust + intercropping with ryegrass. The results showed that both mulching and intercropping could improve the soil moisture content, but the mulch ratio could improve the soil moisture content of tea plantation than intercrop. Mulch and intercropping could effectively reduce soil bulk density, but the difference between them was not significant. Mulch and intercropping could reduce the pH of soil to a certain extent, in which the effect of intercropping broad bean on reduced pH is significantly. Mulch and intercropping could effectively control weeds and soil fertility in tea plantation. The effect of covering sawdust + intercropping ryegrass on weed control was the best. Intercropping broad bean and pea had the best effect on soil improvement. Intercropping of ryegrass, broad bean and pea could improve the coverage of tea plantation, create a simple three-dimensional compound cultivationmodel, and optimize tea plantation environment.
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2018, Vol. 31 
