The Nutrient Status of Plant Roots Reveals Competition Intensities in Rubber Agroforestry Systems

摘要: Controversial competition theories may confuse the current understanding of belowground plant and thus result in incorrect diagnoses mitigation strategies for nutrient competition. As such, management is a major challenge application development rubber agroforestry systems (AFSs). To explore effects on status AFSs, this study measured carbon, nitrogen, phosphorus concentrations litter soil leaves, stems, roots from five plantations (i.e., monocultures mixed with cocoa, coffee, tea, Flemingia macrophylla (Willd.) Merr., 1910)). The relative intensity indexes were calculated to evaluate each mixed-species system, Bayesian networks established investigate linkage interspecific nutrients. This demonstrated that trees had weak cocoa trees, moderate F. tea intense coffee trees. With increase intensity, negative gradually offset improvement nutrients achieved intercropping. Nitrogen phosphorous translocation stems was enhanced by However, allocation have led insufficient nitrogen supplies leaves. quality therefore decreased because fallen leaves determines initial conditions. Such consequences reduce release depletion. revealed most obvious root status, followed stem leaf statuses. Moreover, further concentration can better indicate than other organs.