Abstract
Plant growth regulators (PGRs) have been widely used in the production of forage seeds. In a two-year field experiment, different concentrations of CCC (500, 750, 1,000, 1,250 g·hm−2) and TE (100, 200, 300, 400 g·hm−2) were sprayed on Dactylis glomerata as well as a mixture of CCC and TE (500 + 50, 500 + 150, 1,000 + 50, 1,000 + 150 g·hm−2). By studying the effects of different PGRs and different concentrations on the characters and seed yield of Dactylis glomerata, it was found that the plant height was significantly reduced by spraying two plant growth regulators alone, and the stem diameter of increased by spraying a mixture of CCC and TE. Different PGRs had different effects on the functional leaves of Dactylis glomerata under different concentrations. Spraying of two PGRs in a certain range of concentrations could significantly improve the seed yield, but when the concentration was too high, the seed yield was reduced. The seed yield of Dactylis glomerata could be significantly increased by spraying a mixture of CCC and TE in the range of the test concentrations. Among them, spraying a mixture of CCC and TE at a concentration of 500 + 150 g·hm−2 had the best effect on increasing seed yield, which increased the average yield by 47.91% in two years. Additionally, the experiment also found that spraying PGRs mainly increased the yield of Dactylis glomerata by increasing the number of fertile tillers·m−2, spikes per fertile tillers, and seed setting rate.
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Claims 7
Claim · model-written summary
Spraying either growth regulator alone significantly reduced plant height.
- Taxon
- Dactylis glomerata
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Dactylis glomeratat0 - Treatment
- spraying two plant growth regulators alonee0
- Outcome
- plant heighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the plant height was significantly reduced by spraying two plant growth regulators alone”
t0“Dactylis glomerata”
Claim · model-written summary
A CCC and TE mixture increased stem diameter.
- Taxon
- Dactylis glomerataDactylis glomeratat0
- Treatment
- spraying a mixture of CCC and TEe0
- Outcome
- stem diametere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stem diameter of increased by spraying a mixture of CCC and TE”
t0“Dactylis glomerata”
Claim · model-written summary
Spraying either regulator within a certain concentration range significantly increased seed yield.
- Taxon
- Dactylis glomerataDactylis glomeratat0
- Treatment
- Spraying of two PGRse0
- Outcome
- seed yielde0
- Direction
- improvee0
- Qualifier
- a certain range of concentrationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying of two PGRs in a certain range of concentrations could significantly improve the seed yield”
t0“Dactylis glomerata”
Claim · model-written summary
Excessively high regulator concentration reduced seed yield.
- Taxon
- Dactylis glomerataDactylis glomeratat0
- Treatment
- concentration was too highe0
- Outcome
- seed yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the concentration was too high, the seed yield was reduced”
t0“Dactylis glomerata”
Claim · model-written summary
The CCC and TE mixture significantly increased seed yield across tested concentrations.
- Taxon
- Dactylis glomerataDactylis glomeratae0
- Treatment
- spraying a mixture of CCC and TEe0
- Outcome
- seed yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed yield of Dactylis glomerata could be significantly increased by spraying a mixture of CCC and TE in the range of the test concentrations.”
Claim · model-written summary
The 500 + 150 g·hm−2 CCC and TE mixture gave the best seed yield increase, averaging 47.91% over two years.
- Taxon
- Dactylis glomerataDactylis glomeratat0
- Treatment
- spraying a mixture of CCC and TE at a concentration of 500 + 150 g·hm−2e0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 47.91%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying a mixture of CCC and TE at a concentration of 500 + 150 g·hm−2 had the best effect on increasing seed yield, which increased the average yield by 47.91% in two years.”
t0“Dactylis glomerata”
Claim · model-written summary
Regulators increased fertile tillers, spikes per fertile tiller, and seed setting rate as contributors to seed yield.
- Taxon
- Dactylis glomerataDactylis glomeratae0
- Treatment
- spraying PGRse0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- increasing the number of fertile tillers·m−2, spikes per fertile tillers, and seed setting ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying PGRs mainly increased the yield of Dactylis glomerata by increasing the number of fertile tillers·m−2, spikes per fertile tillers, and seed setting rate.”
The same questions in other papers
chlormequat chloride · yield · Dactylis glomerata (cocksfoot)Positive and negative results
1 paper in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
class · yield · Dactylis glomerata (cocksfoot)Results agree
1 paper in the same direction as this paper
- positive
application · yield · Dactylis glomerata (cocksfoot)Results agree
1 paper in the same direction as this paper
- positive
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.