Abstract
Water content of summer maize hybrids grown in China is too high at harvesting stage, which limits the development of grain mechanical harvesting technology. Spraying the desiccant can regulate physiological process of crop grain filling and reduce water content at harvest. We explored the effects of spraying the desiccant on the dehydration process, grain moisture, and grain quality of summer maize hybrids differing in maturity. Spraying the desiccants reduced dry matter accumulation in different organs of maize, with strongest reduction of middle-late maturity hybrids. Dry matter transfer to the grains of the plants and the harvest index was improved, but with no changes of grain quality. The dehydration rate of grains was positively correlated with the rate of dehydration in diffe-rent organs. The dehydration rate of grains after spraying the desiccants was significantly positively correlated with the rate of dehydration of stems and sheaths. With no negative effects on yield, spraying the desiccant increased the total dehydration rate, shortened the time from flowering to physiological maturity, and increased the time from physiological maturity to harvest, which was beneficial to the further reduction of grain moisture in the later stage. The possibility of grain mechanical harvesting was increased. The economic benefits of spraying the desiccants on mechanical grain harvest of summer maize hybrids differing in maturity were not significantly different from those of ear mechanical harvesting. The economic benefits of middle-late maturity hybrids were higher than those of early maturity hybrids. Spraying desiccant may improve the possibility of grain mechanical harvesting.
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Claims 13
Claim · model-written summary
Spraying desiccants reduced dry matter accumulation in different organs of maize.
- Treatment
- Spraying the desiccantse1
- Outcome
- dry matter accumulation in different organse1
- Direction
- reducede1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Spraying the desiccants reduced dry matter accumulation in different organs of maize”
Claim · model-written summary
The reduction in dry matter accumulation from desiccant spraying was strongest in middle-late maturity maize hybrids.
- Material
- middle-late maturity hybridse1
- Treatment
- Spraying the desiccantse1
- Outcome
- dry matter accumulatione1
- Direction
- strongest reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Spraying the desiccants reduced dry matter accumulation in different organs of maize, with strongest reduction of middle-late maturity hybrids”
Claim · model-written summary
Desiccant spraying improved dry matter transfer to the grains and the harvest index of summer maize.
- Treatment
- Spraying the desiccantse2
- Outcome
- Dry matter transfer to the grains of the plants and the harvest indexe1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Dry matter transfer to the grains of the plants and the harvest index was improved”
e2“Spraying the desiccants reduced”
t0“summer maize”
Claim · model-written summary
Desiccant spraying did not change grain quality of summer maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“with no changes of grain quality”
e2“Spraying the desiccants reduced”
t0“summer maize”
Claim · model-written summary
Grain dehydration rate was positively correlated with dehydration rate in different organs of summer maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The dehydration rate of grains was positively correlated with the rate of dehydration in diffe-rent organs”
t0“summer maize”
Claim · model-written summary
After desiccant spraying, grain dehydration rate was significantly positively correlated with the dehydration rate of stems and sheaths.
- Organ / stage
- stems and sheathse1
- Treatment
- spraying the desiccantse1
- Outcome
- dehydration rate of grainse1
- Direction
- positively correlatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The dehydration rate of grains after spraying the desiccants was significantly positively correlated with the rate of dehydration of stems and sheaths”
t0“summer maize”
Claim · model-written summary
Desiccant spraying had no negative effects on yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With no negative effects on yield, spraying the desiccant”
t0“summer maize”
Claim · model-written summary
Desiccant spraying increased the total dehydration rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“spraying the desiccant increased the total dehydration rate”
t0“summer maize”
Claim · model-written summary
Desiccant spraying shortened the time from flowering to physiological maturity.
- Treatment
- spraying the desiccante1
- Outcome
- time from flowering to physiological maturitye1
- Direction
- shortenede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“spraying the desiccant increased the total dehydration rate, shortened the time from flowering to physiological maturity”
t0“summer maize”
Claim · model-written summary
Desiccant spraying increased the time from physiological maturity to harvest, which favored further grain moisture reduction.
- Treatment
- spraying the desiccante2
- Outcome
- time from physiological maturity to harveste1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“increased the time from physiological maturity to harvest”
e2“spraying the desiccant increased”
t0“summer maize”
Claim · model-written summary
The possibility of grain mechanical harvesting was increased by desiccant spraying.
- Treatment
- Spraying the desiccantse2
- Outcome
- possibility of grain mechanical harvestinge1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The possibility of grain mechanical harvesting was increased”
e2“Spraying the desiccants reduced”
t0“summer maize”
Claim · model-written summary
Economic benefits of desiccant spraying with mechanical grain harvest of summer maize hybrids were not significantly different from those of ear mechanical harvesting.
- Treatment
- spraying the desiccantse1
- Outcome
- economic benefitse1
- Direction
- not significantly differente1
- Comparator
- ear mechanical harvestinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The economic benefits of spraying the desiccants on mechanical grain harvest of summer maize hybrids differing in maturity were not significantly different from those of ear mechanical harvesting”
Claim · model-written summary
Economic benefits were higher for middle-late maturity maize hybrids than for early maturity hybrids.
- Material
- middle-late maturity hybridse1
- Outcome
- economic benefitse1
- Direction
- highere1
- Comparator
- early maturity hybridse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The economic benefits of middle-late maturity hybrids were higher than those of early maturity hybrids”
t0“summer maize”
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See all 629 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.