Efficacy of three 15N labelling techniques for estimating below-ground N in Sesbania rostrata

被引：10

作者：

Chalk, PM ^{[1
]}

Ladha, JK ^{[1
]}

Padre, A ^{[1
]}

机构：

[1] Int Rice Res Inst, Crop Soil & Water Sci Div, Matro Manila, Philippines

来源：

BIOLOGY AND FERTILITY OF SOILS | 2002年 / 35卷 / 05期

关键词：

adventitious root labelling; foliar labelling; N-15; stem injection;

D O I：

10.1007/s00374-002-0460-x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Three N-15 labelling strategies for estimating below-ground N in Sesbania rostrata grown in pots under flooded conditions were examined. The estimated proportions of total plant N resident below-ground were 13% (stem injection), 42% (leaf immersion) and 56% (adventitious root feeding). The average estimate based on leaf and root immersion (49%) was considered to be realistic on the basis of published literature with other foliar labelled legumes, while root and root-derived N appeared to be underestimated by stem injection.

引用

页码：387 / 389

页数：3

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