Effect of intercropping in different rubber plantations on productivity,economical benefit and net greenhouse gases emission of arrowroot
[Objective]The present study aimed to construct and develop rubber-based agroforestry systems for increasing total production and ecological benefit,thus ensuring the sustainable development of natural rubber cultivation in Hainan province.[Method]The research fo-cused on the starch crops Maranta arundinacea L.(arrowroot),which were intercropped in immature conventional single-row rubber planta-tion(6-year old),immature(6-year old)and mature(20-year old)double-row rubber plantations.Its feasibility of intercropping in differ-ent rubber plantation was assessed based on its light condition,soil nutrient content,productivity,economical benefit and greenhouse gases emission.[Result]The light condition in the immature conventional single-row rubber plantation was the poorest.Yield of arrowroot inter-cropped in this rubber plantation was only 4750 kg/hm2,while the yield of arrowroot intercropped in the immautre and mature double-row rubber plantations were 27 470 and 11 190 kg/hm2,respectively,which light conditions were better(P＜0.05).The variation of arrowroot biomass between different treatments was consistent with the yields.Totally,the nutritional ingredient(starch,crude protein and soluble sugar)did not differ significantly between treatments.The economical benefits of arrowroot intercropped in immature and mature double-row rubber plantation were 86 185 and 9285 Yuan/hm2,respectively,while arrowroot intercropped in immature single-row rubber plantation was-21 415 Yuan/hm2.In terms of net greenhouse gas emission,only the treatment intercropped in immature double-row rubber plantation was a sink with a potential of 368 kg/hm2,while the other treatments were source of greenhouse gas emission.[Conclusion]The highest produc-tivity and economical benefit are found in treatment of arrowroot intercropped in immature rubber plantation.Meanwhile,ecological benefit is also obtained.This type of rubber-based agroforestry system is suitable and recommended for popularization in Hainan province.
Rubber-based agroforestry systemMaranta arundinacea L.ProductivityEconomical and ecological benefit
万方数据
维普
