Abstract
The differen tial response of crop growth to light intensity and N levels was studied in a controlle d environm ent and under field condition s for two growing seasons in 1967 and 1968.When N03-N and NH4N03 were used respectiv ely in the controlle d environm ent and field studies, the rates of increase in response of vegetativ e corn growth to N increased with higher light levels.The resulting shadingx N interacti on on growth under field condition s was consiste nt in both years.Reductio n of N0 3 -N in the leaf and reduction of N02-N in the stalk were found to control the differen tial response of N uptake to shading and N levels.Water insoluble protein-N fraction of the leaf and stalk and NH 4 -N fraction of the leaf parallele d total N uptake in response to shading and N levels.After shade removal, light appeared to be critical on the shading-N effect during the vegetativ e period on subseque nt stover and grain yields.The differen tial response of grass and alfalfa in a mixture to shading and N, however, depended on their competit ion for light at low and high N levels.Percentage and dry matter yie1d of a1fa1fa in grass-a1fa1fa mixture (1967) 112 Total N uptake by grass and a1fa1fa in the mixture (1967Effects of artificia1 shading on nitrification, sail moisture 1eve1s, air and sail temperatures (1967 and 1968)Total dry matter yie1d of grass-1egume mixture ......
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Claims 7
Claim · model-written summary
The increase in vegetative corn growth with nitrogen was greater at higher light levels.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Ne0
- Outcome
- vegetativ e corn growthe0
- Direction
- increasede0
- Comparator
- higher light levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rates of increase in response of vegetativ e corn growth to N increased with higher light levels”
Claim · model-written summary
Shading and nitrogen interacted in their effect on field growth in both years.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- shadingx Ne0
- Outcome
- shadingx N interacti on on growthe0
- Qualifier
- both yearse0
- Setting
- field condition se0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The resulting shadingx N interacti on on growth under field condition s was consiste nt in both years”
t0“corn and grass-legume mixture”
Claim · model-written summary
Leaf nitrate nitrogen and stalk nitrite nitrogen reductions were linked to differential nitrogen uptake under shading and nitrogen levels.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leafe0
- Outcome
- differen tial response of N uptakee0
- Qualifier
- Reductio n of N0 3 -N in the leaf and reduction of N02-N in the stalke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reductio n of N0 3 -N in the leaf and reduction of N02-N in the stalk were found to control the differen tial response of N uptake to shading and N levels”
t0“corn”
Claim · model-written summary
Leaf and stalk water insoluble protein nitrogen and leaf ammonium nitrogen paralleled total nitrogen uptake across shading and nitrogen levels.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- leaf and stalke0
- Treatment
- shading and N levelse0
- Outcome
- total N uptakee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water insoluble protein-N fraction of the leaf and stalk and NH 4 -N fraction of the leaf parallele d total N uptake in response to shading and N levels”
t0“corn”
Claim · model-written summary
After shade removal, light appeared critical to the shading and nitrogen effect on subsequent stover and grain yields.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- shade removale0
- Outcome
- stover and grain yieldse0
- Qualifier
- light appeared to be criticale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After shade removal, light appeared to be critical on the shading-N effect during the vegetativ e period on subseque nt stover and grain yields”
t0“corn”
Claim · model-written summary
Grass response to shading and nitrogen depended on competition for light at low and high nitrogen levels.
- Taxon
- grasse0
- Treatment
- shading and Ne0
- Interactor
- alfalfa
Medicago sativae0other - Outcome
- differen tial response of grasse0
- Qualifier
- competit ion for light at low and high N levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differen tial response of grass and alfalfa in a mixture to shading and N, however, depended on their competit ion for light at low and high N levels”
Claim · model-written summary
Alfalfa response to shading and nitrogen depended on competition for light at low and high nitrogen levels.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- shading and Ne0
- Interactor
- grasse0other
- Outcome
- differen tial response of grass and alfalfae0
- Qualifier
- competit ion for light at low and high N levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differen tial response of grass and alfalfa in a mixture to shading and N, however, depended on their competit ion for light at low and high N levels”
The same questions in other papers
nitrogen · growth · Zea mays (maize)Positive and negative results
618 papers in the same direction as this paper · 115 in the opposite direction · 14 reporting no difference from an alternative
- negative
- no effect
- negative
744 papers more in this group
See all 748 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.