Nitrate reductase activity as an indicator for assessing the nitrogen requirement of grass crops | Zendy

BarAkiva A. | Zendy; Sagiv J. | Zendy; Leshem J. | Zendy

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Nitrate reductase activity as an indicator for assessing the nitrogen requirement of grass crops

Author(s) -

BarAkiva A.,

Sagiv J.,

Leshem J.

Publication year - 1970

Publication title -

journal of the science of food and agriculture

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.782

H-Index - 142

eISSN - 1097-0010

pISSN - 0022-5142

DOI - 10.1002/jsfa.2740210803

Subject(s) - nitrate reductase , nitrogen , chemistry , agronomy , nitrate , substrate (aquarium) , yield (engineering) , biology , ecology , materials science , organic chemistry , metallurgy

The enzymic nitrate reduction capacity of leaves, which is defined as the rate of response to the inducing stimulus of externally added NO 3 substrate to incubated leaf fragments, is proposed as a measure for assessing the nitrogen fertilisation requirement of grass crops. The assay was tested in an annual ryegrass field experiment plot, where the effect of increasing N levels was studied. The rate of response diminished from 11 to 1 and was negatively correlated with the yield and NO 3 concentration in the leaves.

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