Publications

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[effects of cutting on the population dynamics of main insect pests on alfalfa].a systematic investigation was made on the effects of cutting on the population dynamics of main insect pests on alfalfa in dingxi of gansu province. the results showed that the effects of cutting varied significantly with the kinds of insect pests. the seasonal average population densities of therioaphis trifolii, acyrthosiphon pisum and thrips decreased significantly and maintained at a low level under the first cutting in early june, but less variation was observed under the second cutting in ...200818533546
[root system development ability of several alfalfa cultivars in the hilly and valley regions of loess plateau].a field study was conducted in the hilly and valley regions of loess plateau in gansu province to analyze the root system development ability of several alfalfa (medicago sativa) cultivars. eight introduced cultivars and one local cultivar were arranged in the same site. the secondary roots of alfalfa cultivars grew mainly from the taproot underground 10-20 cm depth, and there were no secondary roots below 50 cm depth. the total amount of secondary roots of sandili and ameristand 201 was the big ...200212422841
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