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CHEN Shan, CHEN Shuang-lin**, GUO Zi-wu
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Abstract: Mulching with organic matters (rice straw and rice hull) in winter is a management technology to promote the early growth of bamboo shoots. To understand the occurrence of leafeating insects under the influence of mulching management, the effects of mulching on leaf nutrition quality and leaf palatability to the leafeating insects were analyzed. The contents of C, N, P, structural carbohydrates, nonstructural carbohydrates, chemical defense substances in leaves of 1-3 years old Phyllostachys violascens from bamboo stands with different mulching managements, including the respitemulching (3-year mulching + 3-year respite), long-term mulching (consecutive 6-year -ulching) and non mulching (CK) were determined. The results showed that, compared with CK, the respitemulching treatment did not affect C concentration in leaves of 1-3 years old culms, but led to a decline in starch, cellulose and phenolic acids. Other indexes of 2 and 3 years old culms and lignin, oxalic acid of 1 year old culms in respitemulching treatment were higher compared to CK, while no difference was found in other indexes of 1 year old culms. On the other hand, the long-term mulching treatment did not change leaf phenolic acid concentration of 1 and 2 years old culms, but lead to an increase in P, oxalic acid and lignin, and a decrease of other indexes. P, sucrose, lignin, oxalic acid, phenolic acid increased, while other indexes of 3 years old culms decreased in the long-term mulching treatment. Furthermore, long-term mulching treatment influenced the nutrient balance of leaf C, N, and P obviously. All results indicated that the mulching management had a significant influence on the leaf nutrition quality and leaf palatability to leaf-eating insects. Leaf nutrition quality and defense ability were enhanced in the respite-mulching stand while the long-term mulching stand was easier to induce the occurrence and outbreak of leaf-eating insects.
Key words: forest type, soil microbial biomass carbon, Cunninghamia lanceolata., soil dissolved organic matter
CHEN Shan, CHEN Shuang-lin**, GUO Zi-wu. Effects of mulching management on leaf nutrition quality of Phyllostachys violascens and leaf palatability to leaf-eating insects.[J]. cje.
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URL: https://www.cje.net.cn/EN/abstract/abstract21468.shtml
https://www.cje.net.cn/EN/Y2014/V33/I5/1253