淮北棉田节肢动物优势种群时空生态位及天敌对棉蚜控制作用研究

对淮北棉田节肢动物优势种群组成和时空生态位进行分析，结果表明：棉蚜、烟粉虱、棉叶螨、棉盲蝽、四点亮腹蛛、龟纹瓢虫、T-纹豹蛛、草间小黑蛛、八斑球腹蛛、华姬猎蝽、小花蝽和青翅隐翅虫为优势种群；时间和空间生态位宽度值都是以龟纹瓢虫最大，捕食性天敌优势种群与棉蚜时间生态位重叠值以八斑球腹蛛最大，空间生态位重叠值以T-纹豹蛛最大。综合分析了捕食性天敌优势种群的数量、与棉蚜发生在时间上同步性和空间上同域性以及捕食量大小，建立了捕食性天敌优势种群对棉蚜控制作用模型，以龟纹瓢虫控制作用指数最大，达19.82%。

Studies on the Temporal-Spatial Niche of Arthropods Dominant Population and Control Effect of Natural Enemies to Aphis gossypii in Cotton Fields in the North of Anhui Province

The composition of dominant population of arthropods and temporal-spatial niche was analyzed in the paper. The results showed the dominant populations were Aphis gossypii, Bemisia tabaci, Tetranychus cinnabarinus, Adelphocoris spp. Singa pygmaea, Propylaea japonica, Pardosa T-insignita, Erigonidium graminicolum, Theridion octomaculatum, Nabis sinoferus, Orius similis and Paederus fuscipes. The temporal and spatial niche breadth value of Propylaea japonica was maximum, and the temporal niche overlap value of Theridion octomaculatum between dominant predatory enemies and Aphis gossypii was maximum and the spatial niche overlap of Pardosa T-insignita was maximum. The evaluated model of dominant predatory enemies to Aphis gossypii was constructed considering the number, temporal and spatial niche, predatory capacity of dominant predatory enemies at the same time, and based on model the control effect of Propylaea japonica was maximum, arriving at 19.82%.