THE USE OF A DOUBLE ISOTOPE (N-15 AND S-34) LABELING TECHNIQUE TO ASSESS THE SUITABILITY OF VARIOUS REFERENCE CROPS FOR ESTIMATING NITROGEN-FIXATION IN GLIRICIDIA-SEPIUM AND LEUCAENA-LEUCOCEPHALA

被引：13

作者：

AWONAIKE, KO ^{[1
]}

DANSO, SKA ^{[1
]}

ZAPATA, F ^{[1
]}

机构：

[1] FAO, DIV IAEA, A-1400 VIENNA, AUSTRIA

来源：

PLANT AND SOIL | 1993年 / 155卷

关键词：

BIOLOGICAL NITROGEN FIXATION (BNF); GLIRICIDIA SEPIUM; LEUCAENA LEUCOCEPHALA; N-15; N-FIXING TREES (NFTS); REFERENCE CROPS; RHIZOBIA; S-34;

D O I：

10.1007/BF00025048

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

In this study, an approach involving a double isotope (N-15 and S-34) labelling technique was used to examine which of five reference crops (Eucalyptus camaldulensis, Cassia siamea, Cassia spectabilis, Lolium perenne and Eucalyptus grandis) would be suitable for measuring N fixed by Gliricidia sepium and Leucaena leucocephala. The rationale is that the ratio of fertilizer-derived S to soil-derived S in a suitable reference crop is similar to that measured in the nitrogen fixing tree (NFT) since the N ratios in the two crop types cannot be measured directly. E. camaldulensis and E. grandis were found to be suitable reference crops because they absorbed fertilizer and soil S in the same ratio as G. sepium and L. leucocephala.

引用

页码：325 / 328

页数：4

共 15 条

[1]

AWONAIKE KO, 1992, TROP AGRIC, V69, P381

[2] QUANTIFICATION OF THE CONTRIBUTION OF N-2 FIXATION TO FIELD-GROWN GRAIN LEGUMES - A STRATEGY FOR THE PRACTICAL APPLICATION OF THE N-15 ISOTOPE-DILUTION TECHNIQUE [J].