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cje ›› 2000, Vol. ›› Issue (2): 20-23,71.

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Study on the Stability of Cotton Field Ecosystem Controlled by Insecticide and by Nature

Zhu Xiwum1, Wang Shize2, Xiong Minghua3   

  1. 1. Institute of plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125;
    2. North western Agricultural University, Yangling, Shanxi 712100;
    3. Ziyang plant protection station, Yiyang, Hunan, 413000
  • Received:1999-01-25 Revised:1999-05-10 Online:2000-04-10

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Abstract: The stability of ecosystems is studied in cotton field ecosystems controlled by insecticide and by nature. The two kinds of ecosystems are stable ecosystem. But the stability of the cotton field ecosystem controlled by nature is larger than that of the cotton field ecosystems controlled by insecticide. The relation between diversity and stability is analyzed.

Key words: heat resource, vertical decreasing rate, three-dimensional climate, mountainous region, Nanling Mountains.