cje ›› 2012, Vol. 31 ›› Issue (09): 2170-2176.
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PENG Shun-lei1,2, WANG De-xiang1**, CHAI Zong-zheng
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Abstract: By the method of plot investigation, a comparative study was made on the differences in the community characteristics among the exotic tree species Larix principisrupprechtii plantation, indigenous tree species Pinus armandii plantation, and P. armandii secondary forest in Huoditang forest area of Qinling Mountains. The similarity coefficient between L. principisrupprechtii plantation and P. armandii secondary forest was only 0.11, and the species number in the P. armandii secondary forest and P. armandii plantation was significantly greater than that in L. principisrupprechtii plantation (P<0.01). The Margalef index, Simpson index, ShannonWiener index, and Pielou evenness index in the arbor, shrub, and herb layers of P. armandii secondary forest and P. armandii plantation were significantly higher than those in L. principisrupprechtii plantation (P<0.001), but the four diversity indices in the shrub layer and herb layer in P. armandii secondary forest and P. armandii plantation had less difference (P>0.05). The compose index (CI) was the lowest (0.3) in L. principisrupprechtii plantation, 3.5 in P. armandii plantation, and the highest (5.2) in P. armandii secondary forest, showing a significant difference among the three forest types (P<0.001). This study indicated that exotic tree species introduction led to the decrease of species abundance, species diversity, and stand’s naturalized degree in the forest community in Qinling Mountains, while natural secondary forest succession or indigenous tree species plantation were more beneficial to the restoration of understory vegetation than exotic tree species plantation.
Key words: short-term continuous lighting with LED, nitrogen level, nitrogen form, hydroponic lettuce, nutritional quality.
PENG Shun-lei1,2, WANG De-xiang1**, CHAI Zong-zheng. Effects of exotic tree species Larix principisrupprechtii introduction on forest community in Qinling Mountains of Northwest China.[J]. cje, 2012, 31(09): 2170-2176.
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URL: https://www.cje.net.cn/EN/abstract/abstract20288.shtml
https://www.cje.net.cn/EN/Y2012/V31/I09/2170