THE EFFECTS OF ELEVATED CARBON-DIOXIDE, TEMPERATURE AND SOIL-MOISTURE ON THE WATER-USE OF STANDS OF GROUNDNUT (ARACHIS-HYPOGAEA L)

被引：17

作者：

STRONACH, IM ^{[1
]}

CLIFFORD, SC ^{[1
]}

MOHAMED, AD ^{[1
]}

SINGLETONJONES, PR ^{[1
]}

AZAMALI, SN ^{[1
]}

CROUT, NMJ ^{[1
]}

机构：

[1] UNIV NOTTINGHAM,TROP CROPS RES UNIT,LOUGHBOROUGH LE12 5RD,LEICS,ENGLAND

来源：

JOURNAL OF EXPERIMENTAL BOTANY | 1994年 / 45卷 / 280期

关键词：

ARACHIS HYPOGAEA; ELEVATED CO2; WATER USE;

D O I：

10.1093/jxb/45.11.1633

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Stands of groundnut (Arachis hypogaea L. cv. Kadiri 3) were grown in controlled environment glasshouses at two mean air temperatures (28 degrees C and 32 degrees C), two atmospheric CO2 concentrations (375 ppmv and 700 ppmv) and two soil moisture treatments (irrigated weekly to field capacity or allowed to dry from 22 d after sowing). The transpiration equivalent, Omega(W) (g kPa kg(-1))-the product of the accumulated biomass/transpired water ratio and the saturation deficit-was calculated for all the treatments using aboveground harvest, root core and neutron probe measurements. Neither temperature nor soil moisture treatment was found to have an effect on Omega(W). Increased CO2 concentration raised Omega(W) from 6.21 +/- 0.30 to 7.67 +/- 0.29 g kPa kg(-1), an increase of 24% (P < 0.005). The importance of accounting for root material and pod composition when calculating Omega(W) was highlighted.

引用

页码：1633 / 1638

页数：6

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