Abstract
Abstract Although a mixture of NO3‐N and NH4‐N improves the growth of maize plants over that with NO3‐N or NH4‐N alone, the ratio required for maximum growth remains unclear. Maize hybrid B73 × MoI7 was grown in vermiculite at 25°C in a controlled climate room with a 16‐h photoperiod at 280 μE/sec/m2 to evaluate effects of the form and amount of N, and the N/K ratio on the growth of seedlings. The proportion of NH4‐N in the mixture required for maximum growth varied according to the total amount of N in the medium. Under low N conditions, seedlings grew faster with a higher proportion of N in the NH4 form while a greater proportion of NO3‐N was advantageous at high N conditions. When seedlings were grown under NH4‐N as the sole N source, high K levels promoted root growth, and dry matter and N accumulation in the shoot.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
The NH4-N proportion in the mixture required for maximum maize growth varies with the total amount of N in the medium.
- Treatment
- total amount of N in the mediume0
- Outcome
- proportion of NH4‐N in the mixture required for maximum growthe0
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and nitrogen uptake of maize”
e0“The proportion of NH4‐N in the mixture required for maximum growth varied according to the total amount of N in the medium”
Claim · model-written summary
Under low N, maize seedlings grew faster with a higher proportion of N in the NH4 form.
- Treatment
- higher proportion of N in the NH4 forme1
- Outcome
- seedlings grew fastere1
- Direction
- fastere1
- Qualifier
- Under low N conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and nitrogen uptake of maize”
e1“Under low N conditions, seedlings grew faster with a higher proportion of N in the NH4 form”
Claim · model-written summary
Under high N, a greater proportion of NO3-N was advantageous for maize seedlings.
- Treatment
- greater proportion of NO3‐Ne2
- Outcome
- advantageouse2
- Direction
- advantageouse2
- Qualifier
- at high N conditionse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and nitrogen uptake of maize”
e2“a greater proportion of NO3‐N was advantageous at high N conditions”
Claim · model-written summary
With NH4-N as the sole N source, high K levels promoted maize root growth.
- Organ / stage
- roote3
- Treatment
- high K levelse3
- Outcome
- root growthe3
- Direction
- promotede3
- Qualifier
- under NH4‐N as the sole N sourcee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and nitrogen uptake of maize”
e3“When seedlings were grown under NH4‐N as the sole N source, high K levels promoted root growth”
Claim · model-written summary
With NH4-N as the sole N source, high K levels promoted dry matter and N accumulation in the maize shoot.
- Organ / stage
- shoote4
- Treatment
- high K levelse4
- Outcome
- dry matter and N accumulatione4
- Direction
- promotede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and nitrogen uptake of maize”
e4“high K levels promoted root growth, and dry matter and N accumulation in the shoot”
The same questions in other papers
potassium · growth · Zea mays (maize)Results differ
98 papers in the same direction as this paper · 15 in the opposite direction
- no effect
- no effect
- negative
110 papers more in this group
See all 114 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.