Abstract: The interaction of wheat with Trifolium repens in the complex community was studied and the results showed that 1)stratification of the above-ground parts occurred and wheat roots were better developed in the complex community; 2)intercropped Trifolium repens with wheat could improve yield components of wheat in edge lines and lead to 17.9% more yield compared with that of wheat in the midle line,resulting in higher yield per unit of net planting area of wheat in intercropping community than that in sole cropping; 3)inhibition to growth of Trifolium repens was significantly related to leaf area of wheat in the edge liness; 4)the yield of intercropped wheat was higher than that in sole cropping when sowing area of wheat in intercropping was more that 85% of the total area, whearas when this ratio was less than75%, the yield of intercropped wheat was lower than that of sole cropping; and 5)wheat yield in mix-cropping was higher than that in sole cropping. It is concluded that wheat is predominant population in wheat and Trifolium repens complex community.

Key words: surgical implantation, dummy ultrasonic transmitter, growth, survival, transmitter retention, Ctenopharyngodon idella.