PRIMARY PRODUCTION OF THE CENTRAL GRASSLAND REGION OF THE UNITED-STATES
PRIMARY PRODUCTION OF THE CENTRAL GRASSLAND REGION OF THE UNITED-STATES
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DOI：
10.2307/1943158
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发表时间：
1988-02-01
期刊：
影响因子：
4.8
通讯作者：
LAUENROTH, WK
中科院分区：
文献类型：
--
作者：
SALA, OE;PARTON, WJ;LAUENROTH, WK
草地地上净初级生产力受年降水量及其分布的影响很大。对美国中部9500个地点收集的数据进行分析，证实了水的可用性作为生产控制的压倒性重要性。区域生产空间格局反映了年降水量的东西梯度。地上净初级生产量的最低值出现在西部，最高值出现在东部。这种空间格局在不利年份向东移动，在有利年份向西移动。产量的年间变化在北方新墨西哥州和堪萨斯西南部最大，向北和向南减少。生产的区域格局主要是由年降水量。在网站上的生产水平解释了年降水量，土壤持水能力，和一个相互作用项。我们的结果支持逆纹理假说。当降水量为370 mm/yr时。
Aboveground net primary production of grasslands is strongly influenced by the amount and distribution of annual precipitation. Analysis of data collected at 9500 sites throughout the central United States confirmed the overwhelming importance of water availability as a control on production. The regional spatial pattern of production reflected the east-west gradient in annual precipitation. Lowest values of aboveground net primary production were observed in the west and highest values in the east. This spatial pattern was shifted eastward during unfavorable years and westward during favorable years. Variability in production among years was maximum in northern New Mexico and southwestern Kansas and decreased towards the north and south. The regional pattern of production was largely accounted for by annual precipitation. Production at the site level was explained by annual precipitation, soil water-holding capacity, and an interaction term. Our results support the inverse texture hypothesis. When precipitation is 370 mm/yr.