全周期间作模式胶园林下植物多样性特征

Plant Diversity in Whole Production Cycle Intercropping Rubber Plantation

通过调查传统胶园与全周期间作模式胶园内植物多样性的差异,探讨全周期种植方式对胶园内植物多样性的影响。结果表明:全周期间作模式胶园内有37种物种,总密度为0.975个/m2,而传统胶园有51种物种,总密度为2.698个/m2;全周期间作模式胶园内Simpson指数、Shannon-wiener指数和Margalef植物丰富度指数均显著小于传统胶园,而其生态优势度指数显著高于传统胶园(p<0.05);与传统胶园相比,全周期种植方式能导致胶园林下植物物种和个体数(或丛数)减少,植物多样性降低,但其物种的生态优势度较大。

To investigate the effect of whole production cycle planting pattern on the plant diversity in rubber plantation, the difference of plant diversity in conventional（C）and whole production cycle intercropping（I）rubber plantation were observed. Results showed that there were 37 species in the I rubber plantation, while 51 species in the C rubber plantation, with total density of 0.975 individual/m^2 and 2.698 individuallm2, respectively. Simpson index, Shannon-wiener biodiversity index and Margalef index in the I rubber plantation were significantly lower than those in the C rubber plantation, hut its ecological importance value was significantly higher （p 〈0.05）. Compared to the C rubber plantation, the whole production cycle planting pattern reduced plant species and individual in rubber plantation, resulting in lower plant diversity, but increased its ecological dominance index.