Soil nitrogen fractions and their relationship to nitrogen fertilizer yield response and nitrogen uptake of Sudan-Sorghum hybrid grass on twenty Quebec soils.
Year: 1967
Type: dissertation
Abstract: Acid hydrolysable organic nitrogen fractions, namely amine acid N, hydrolysable ammonium N, hexosamine N, and total hydrolysable N were determined before and after two crops of Sudan-Sorghum hybrid grass grown under controlled conditions on twenty Quebec soils.The relationship between these fractions and yield response to nitrogen fertilizer and N uptake by Sudan-Sorghum hybrid grass was examined by correlation and regression methods and compared with corresponding relations obtained using incubation and boiling water extraction methods as indices of soil N availability.Amino acid N and hydrolysable ammonium N contributed more to total NIost during the two crops and were found to be more important th an hexosamine N in supplying mineral N to plants.The amino acid N, hydrolysable ammonium N, and total hydrolysable N were significantly correlated with per cent yield, log per cent yield decrement and N uptake.Better cor'relations were obtained with the incubation and boiling ,~ter extraction methods.
Source: eScholarship@McGill (McGill)
DOI: 10.82308/49722
Author: Kadirgamathaiyah, Sinnathamby.
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W3181323125