J4 ›› 2009, Vol. 27 ›› Issue (3): 276-281.

• 论文 • 上一篇    下一篇

玛曲草原气候资源利用与牧草生产力的研究

李国军张胜智吉哲君宁和平   

  1. 甘肃省甘南藏族自治州气象局,甘肃 合作 747000
  • 收稿日期:2009-09-25 修回日期:2009-07-27 出版日期:2010-09-30 发布日期:2009-09-30
  • 作者简介:李国军(1964-),男,甘肃灵台人,工程师,主要从事天气预报及决策气象服务工作. E-mai:l ligj378@ yahoo. com. cn

Analysis on C limate Resource Utilization and Pastures Productivity inM aqu Grassland

 LI Guo-Jun, ZHANG Qing-Zhi, JI Zhe-Jun, NING He-Beng   

  1. (GannanMeteorologicalBureau ofGansu Province, Hezuo747000,China)
  • Received:2009-09-25 Revised:2009-07-27 Online:2010-09-30 Published:2009-09-30

摘要:

用3阶多项式生长曲线数学模型拟合牧草产量各状况年的牧草生产力,与实际值吻合较好。模拟结果表明,最大生长率70. 2 kg/hm2·d,最小生长率1. 6 kg/hm2·d;月最大产量2 042. 5 kg/hm2,月最小产量57. 6 kg/hm2。生长季5~9月,旬≥0℃的累积积温每增加1℃,最高状况年比最低状况年每旬增加干物重2. 54 kg/hm2;旬累积降水量每增加1 mm,最高状况年比最低状况年每旬增加干物重7. 33 kg/hm2;旬累积日照时数每增加1 h,最高状况年比最低状况年每旬增加干物重3. 83 kg/hm2。考虑到倾向率变化的不同,旬累积降水量引起的产量变化是主要原因,旬累积积温次之,旬累积日照时数影响弱。高产年气候资源利用率高,低产年气候资源利用率低。

关键词: 玛曲草原, 气候资源利用, 牧草生产力, 生长数学模型

Abstract:

The pasture’s productivity simulated by the third-order polynomial growth curve mathematicalmodel in different years in Maqu grassland coincided with the actualvalue. The simulation results show that themaximum growth rate is70. 2 kg/hm2·d and the minimum is1. 6 kg/hm2·d. Themonthlymaximum yield is2 042. 5 kg/hm2and theminimum is57. 6 kg/hm2. FromMay to September, the 10 days accumulated temperaturewhich is above 0℃increased 1℃, the pasture’s drymatter increased 2. 54 kg/hm2, and the amount of the precipitation increased every 1 mm in every 10 days, the drymatter increased 7. 33 kg/hm2, aswell as the sunshine duration increased every one hour in every 10 days, the drymatter increased 3. 83 kg/hm2. Considering the difference of the climate
tendency for different factors, the ten days precipitation is themain factorwhich influences the pasture’s yield, and the accumulated temperature in every 10 days plays the second role. The climate resources utilization rate in high production year is higher than that in the low production year.

Key words: Maqu grassland, climate resource utilization, pasture’s productivity, growthmathematicmodel

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