Usefulness of foliar nitrogen-sulfur ratio in spring red wheat

被引：16

作者：

Calvo, Nahuel Ignacio Reussi ^{[3
]}

Echeverria, Hernan Eduardo ^{[1
,2
]}

Rozas, Hernnan Sainz ^{[1
,2
]}

机构：

[1] Est Exp Agropecuaria INTA, Buenos Aires, DF, Argentina

[2] UNMP, Fac Ciencias Agrarias, RA-7620 Balcarce, Argentina

[3] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

来源：

JOURNAL OF PLANT NUTRITION | 2008年 / 31卷 / 09期

关键词：

spring red wheat; sulfur; diagnosis; N : S ratio;

D O I：

10.1080/01904160802244829

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Sulfur (S) availability indicators are necessary for a rational use of fertilizers. Experiments were carried out to evaluate the sensitivity and stability of nitrogen (N):S ratio in spring red wheat. Yield responses were determined in three replications over five experimental sites. Sulfur application did not increase N concentration in plant, whereas the effect on total S concentration was varied. Results showed 25, 35, 80, and 85% correctly diagnosed samples at stages Z22, Z24, Z31, and Z39, respectively. In treatments without S limitations, a decrease in N:S ratio was observed as the crop cycle advanced. Nitrogen: S ratio differed according to the site; however, these variations tend to decrease as the crop cycle advance. In summary, for spring red wheat, N:S ratio in plant is a useful method for S deficiencies diagnostic from the end of tillering to flag leaf.

引用

页码：1612 / 1623

页数：12

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