摘要
黄脊竹蝗(Ceracris kiangsu)是我国南方竹区重大害虫之一。为揭示其发生与环境的关系,通过黄脊竹蝗的取食偏好试验,测定了其对竹类的7个属9个种的取食差异,同时分析了不同竹种竹叶中适口性物质(可溶性糖、可溶性蛋白、单宁酸、硅)以及营养元素(N、P、K、Na、Ca、Mg)含量,并分析了其对黄脊竹蝗取食偏好的影响。结果表明,黄脊竹蝗存在明显的寄主偏好性(P<0.001),9个竹种可划分为嗜好寄主和普通寄主2个类群,毛竹为嗜好寄主。逐步判别分析表明,叶片氮含量、磷含量、单宁含量、钠含量、钙含量、可溶性糖含量、含水率、硅含量和镁含量9个因子在黄脊竹蝗的取食选择中发挥作用,其中N、P、Na及单宁含量关系最密切(依据贡献值大小)。上述研究结果可为竹林的健康经营及黄脊竹蝗的寄主选择的深入研究提供科学参考。
Ceracris kiangsu is one of major defoliators in the bamboo distribution area in southern China. To aim at understanding the relationship between occurrence of the pest and host plants, we tested the feeding preference towards 9 bamboo species belonging to 7 genera, and determined the contents of palatable chemicals （soluble sugar, soluble protein, tannins and silicon） and nutrient elements （N, P, K, Na, Ca and Mg） in the 9 bamboo species. Also, the effects of leaf chemicals on feeding preference for C. kiangsu were analyzed. The results showed that C. kiangsu had significant feeding preference on different bamboo species （P〈0.001）, and the nine bamboos could be classified into two groups, ‘preferred host’ and ‘acceptable host’. The preferred host group only included Phyllostachys edulis. Nine variables including moisture content, total nitrogen content, phosphorus content, sodium content, calcium content, magnesium content, silicon content, soluble sugar content and total tannins content improved a stepwise discriminant model to predict feeding preference of C. kiangsu, and total nitrogen content, phosphorus content, sodium content and total tannins content might be the most important factors. Our findings proved that plant palatability and nutrient level were closely related to the feeding preference of the phytophagous insect, and the contents of nutrient elements as N, P, and Na in bamboo lea-ves were an important reason for host selection of C. kiangsu. Our results provided scientific reference for further studies on the health management of bamboo forests and the host selection of C. kiangsu.
出处
《生态学杂志》
CAS
CSCD
北大核心
2017年第8期2266-2273,共8页
Chinese Journal of Ecology
基金
林业公益性行业科研专项(201304403)
浙江省自然科学基金(LY15C16001)项目资助
关键词
黄脊竹蝗
取食偏好
适口性
营养
逐步判别分析
Ceracris kiangsu feeding preference palatability nutrient element stepwise discriminant analysis
