N-15 DISTRIBUTION IN WHEAT AND CHEMICAL FRACTIONATION OF ROOT-BORNE N-15 IN THE SOIL

被引：13

作者：

Reining, E. ^{[1
]}

Merbach, W. ^{[1
]}

Knof, G. ^{[1
]}

机构：

[1] Zentrum Agrarlandschafts & Landnutzungsforsch ZAL, Inst Rhizospharenforsch & Pflanzenernahrung, Muncheberg, Germany

来源：

ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES | 1995年 / 31卷 / 3-4期

关键词：

Nitrogen; 15; pot experiments; rhizodeposition; roots; shoots; soil nitrogen fractionation; split-root method; spring wheat; Triticum aestivum L;

D O I：

10.1080/10256019508036280

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Spring wheat plants were grown in split-root containers and labelled with N-15 by fertilizing one compartment of the container with (NH4NO3)-N-15-N-15 (95 at.-% N-15 exc.). After the harvest, approx. 90% of the N-15 incorporated by the plants were found in the shoots and 3% in the roots; approx. 7% had been released into the soil of the unlabelled compartment. The N-15 in the soil of the unlabelled compartment was extracted with KCl and hydrolysed with HCl. Approx. 60% of the N-15 was found in the hydrolysable organic N pool of the soil and 9% in the fraction of the soluble and exchangeable inorganic nitrogen.

引用

页码：345 / 349

页数：5