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.
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Claims 5
Claim · model-written summary
Amino acid N and hydrolysable ammonium N supplied more mineral nitrogen to the grass than hexosamine N.
Verbatim
e0“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.”
e1“Sudan-Sorghum hybrid grass on twenty Quebec soils.”
Claim · model-written summary
Amino acid N, hydrolysable ammonium N, and total hydrolysable N correlated significantly with percent yield.
Not reportedSettingDirection
Verbatim
e0“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.”
e1“Sudan-Sorghum hybrid grass on twenty Quebec soils.”
Claim · model-written summary
Amino acid N, hydrolysable ammonium N, and total hydrolysable N correlated significantly with log percent yield decrement.
- Taxon
- Sudan-Sorghum hybrid grasse1
- Outcome
- log per cent yield decremente0
- Qualifier
- significantly correlatede0
Not reportedSettingDirection
Verbatim
e0“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.”
e1“Sudan-Sorghum hybrid grass on twenty Quebec soils.”
Claim · model-written summary
Amino acid N, hydrolysable ammonium N, and total hydrolysable N correlated significantly with nitrogen uptake.
Not reportedSettingDirection
Verbatim
e0“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.”
e1“Sudan-Sorghum hybrid grass on twenty Quebec soils.”
Claim · model-written summary
Incubation and boiling water extraction gave better correlations than the hydrolysable nitrogen fractions.
Not reportedComparator
Verbatim
e0“Better cor'relations were obtained with the incubation and boiling ,~ter extraction methods.”
e1“Sudan-Sorghum hybrid grass on twenty Quebec soils.”