Abstract
Lodging is one of the main factors causing yield loss of maize under high-density planting conditions. Root lodging as an important lodging type has received little attention. Plant growth regulators (PGRs) and nitrogen fertilizer can coordinate the relationship between root lodging and yield. This two-year field experiment was conducted with two nitrogen levels of N225 (225 kg ha−1) and N300 (300 kg ha−1) at a high planting density (90,000 plants ha−1) during the maize growth season from 2019 to 2020. Plant growth regulator (Yuhuangjin, the mixture of 3% DTA-6 and 27% ethephon) was sprayed at the V8 stage. The results showed that PGRs significantly decreased plant height, improved root distribution and dry weight, enhanced photosynthetic rate and activities of photosynthetic carboxylase in ear leaves, and improved root bleeding sap and root activities after the silking stage. N225 combined with PGRs reduced the occurrence of root lodging and was conducive to photosynthate accumulation and root nutrient supply; it coordinated root regulation and morphological and physiological shoot functions, and played a crucial role in reducing root lodging and improving maize yield.
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Claims 7
Claim · model-written summary
Plant growth regulators significantly decreased maize plant height.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGRs significantly decreased plant height”
t0“Maize Crops”
Claim · model-written summary
Plant growth regulators improved maize root distribution and dry weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PGRs significantly decreased plant height, improved root distribution and dry weight”
t0“Maize Crops”
Claim · model-written summary
Plant growth regulators enhanced photosynthetic rate and photosynthetic carboxylase activities in ear leaves.
- Organ / stage
- ear leavese0
- Outcome
- photosynthetic rate and activities of photosynthetic carboxylasee0
- Direction
- enhancede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced photosynthetic rate and activities of photosynthetic carboxylase in ear leaves”
t0“Maize Crops”
Claim · model-written summary
Plant growth regulators improved root bleeding sap and root activities after silking.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved root bleeding sap and root activities after the silking stage.”
t0“Maize Crops”
Claim · model-written summary
N225 combined with plant growth regulators reduced root lodging.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N225 combined with PGRs reduced the occurrence of root lodging”
t0“Maize Crops”
Claim · model-written summary
N225 combined with plant growth regulators favored photosynthate accumulation and root nutrient supply.
- Treatment
- N225 combined with PGRse0
- Outcome
- photosynthate accumulation and root nutrient supplye0
- Direction
- was conducive toe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N225 combined with PGRs reduced the occurrence of root lodging and was conducive to photosynthate accumulation and root nutrient supply”
t0“Maize Crops”
Claim · model-written summary
The authors infer that N225 with plant growth regulators helps improve maize yield.
- Outcome
- maize yielde0
- Direction
- improvinge0
- Qualifier
- coordinated root regulation and morphological and physiological shoot functionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it coordinated root regulation and morphological and physiological shoot functions, and played a crucial role in reducing root lodging and improving maize yield.”
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