土壤水分有效性对三齿拉瑞阿地上部分产量和繁殖分配的一些影响（DC）科夫。

Some effects of soil-moisture availability on above-ground production and reproductive allocation in Larrea tridentata (DC) Cov.

作者信息

Cunningham G L, Syvertsen J P, Reynolds J F, Willson J M

机构信息

Biology Department, New Mexico State University, 88003, Las Cruces, NM, USA.

出版信息

Oecologia. 1979 Jan;40(2):113-123. doi: 10.1007/BF00347929.

DOI:10.1007/BF00347929

PMID:28309510

Abstract

Data from the US/IBP Desert Biome validation studies indicate that above-ground production and biomass allocated to reproduction in Larrea tridentata vary from one year to another depending upon the timing and extent of soil-moisture availability. In an attempt to verify these observations and determine to what extent water availability can affect total aboveground production and reproductive allocation in this widely distributed warm desert shrub, a series of soil-moisture augmentation experiments were conducted. High levels of soil moisture had a greater effect on reproductive allocation than on total above-ground production. Enhanced soil moisture during the period of active growth increased total above-ground production and reduced the percentage of biomass allocated to reproduction. Enhanced soil moisture during the normal periods of little or no growth did not increase total above-ground production.

摘要

来自美国/国际生物学计划（IBP）沙漠生物群落验证研究的数据表明，三齿拉瑞阿（Larrea tridentata）地上部分的产量以及分配给繁殖的生物量会因年份不同而有所变化，这取决于土壤水分可利用的时间和程度。为了验证这些观察结果，并确定水分可利用性在多大程度上会影响这种广泛分布的暖沙漠灌木的地上总产量和繁殖分配，开展了一系列土壤水分增加实验。高水平的土壤水分对繁殖分配的影响大于对地上总产量的影响。生长活跃期土壤水分增加会提高地上总产量，并降低分配给繁殖的生物量百分比。在正常的很少或没有生长的时期增加土壤水分并不会提高地上总产量。