Abstract
Improving rice yield is of great significance to food security. Under limited arable land conditions, improving yield per unit area by optimizing cultivation measures is a key strategy. Planting density is an important factor affecting rice population growth, yield formation and resource utilization efficiency. This study systematically analyzes the theoretical basis and mechanism of optimizing planting density to improve rice productivity, including the impact on plant growth and development, yield composition, rice quality and economic benefits, and discusses it in combination with practical cases in Nanchang, Jiangxi and Leshan, Sichuan. Studies have shown that a reasonable increase in planting density can increase the number of effective panicles and the number of panicles per unit area, thereby significantly increasing rice yield, but too high density will lead to intensified individual competition, a decrease in the number of panicles, a decrease in the fruiting rate, and an increase in the risk of lodging and disease, which will ultimately be counterproductive. The optimal density varies under different ecological regions and cultivation methods, and should be optimized according to local conditions such as variety characteristics, nitrogen fertilizer management and climatic conditions. The Nanchang Plain double-season rice area has achieved good results by appropriately reducing the sowing density to enhance individual lodging resistance, while the Leshan hilly area has achieved group yield increase through close planting combined with machine transplanting. In general, optimizing planting density requires balancing the relationship between group and individual, source of production and source of storage, to achieve high yield and high efficiency and stable yield and increase income. The comprehensive analysis of this article can provide a scientific basis for high-yield rice cultivation.
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Claims 9
Claim · model-written summary
A reasonable increase in planting density increased effective panicles and panicles per unit area in rice.
- Treatment
- a reasonable increase in planting densitye0
- Outcome
- number of effective panicles and the number of panicles per unit areae0
- Direction
- increasee0
Not reportedTaxon
Verbatim
e0“a reasonable increase in planting density can increase the number of effective panicles and the number of panicles per unit area”
Claim · model-written summary
A reasonable density increase significantly raised rice yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- a reasonable increase in planting densitye0
- Outcome
- rice yielde0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a reasonable increase in planting density can increase the number of effective panicles and the number of panicles per unit area, thereby significantly increasing rice yield”
Claim · model-written summary
Excessively high density intensified competition among rice plants.
- Taxon
- RiceOryza sativat0
- Treatment
- too high densitye0
- Outcome
- individual competitione0
- Direction
- intensifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“too high density will lead to intensified individual competition”
t0“Rice Productivity”
Claim · model-written summary
Excessively high density reduced rice panicle number and fruiting rate.
- Taxon
- RiceOryza sativat0
- Treatment
- too high densitye0
- Outcome
- number of panicles, a decrease in the fruiting ratee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“too high density will lead to intensified individual competition, a decrease in the number of panicles, a decrease in the fruiting rate”
t0“Rice Productivity”
Claim · model-written summary
Excessively high rice density increased lodging and disease risk.
- Taxon
- RiceOryza sativat0
- Treatment
- too high densitye0
- Outcome
- risk of lodging and diseasee0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“too high density will lead to intensified individual competition, a decrease in the number of panicles, a decrease in the fruiting rate, and an increase in the risk of lodging and disease”
t0“Rice Productivity”
Claim · model-written summary
Optimal rice planting density varies with ecological region and cultivation method.
- Taxon
- RiceOryza sativat0
- Outcome
- optimal densitye0
- Setting
- different ecological regionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimal density varies under different ecological regions and cultivation methods, and should be optimized”
t0“Rice Productivity”
Claim · model-written summary
Reducing sowing density improved individual rice lodging resistance in the Nanchang Plain double-season area.
- Taxon
- riceOryza sativae0
- Treatment
- appropriately reducing the sowing densitye0
- Outcome
- individual lodging resistancee0
- Direction
- enhancee0
- Setting
- Nanchang Plain double-season rice areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Nanchang Plain double-season rice area has achieved good results by appropriately reducing the sowing density to enhance individual lodging resistance”
Claim · model-written summary
Close planting with machine transplanting increased group rice yield in the Leshan hilly area.
- Taxon
- RiceOryza sativat0
- Treatment
- close planting combined with machine transplantinge0
- Outcome
- group yielde0
- Direction
- increasee0
- Setting
- Leshan hilly areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Leshan hilly area has achieved group yield increase through close planting combined with machine transplanting”
t0“Rice Productivity”
Claim · model-written summary
Planting density should be optimized by variety, nitrogen management and climate for rice.
- Taxon
- RiceOryza sativat0
- Outcome
- optimized according to local conditionse0
- Qualifier
- variety characteristics, nitrogen fertilizer management and climatic conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“should be optimized according to local conditions such as variety characteristics, nitrogen fertilizer management and climatic conditions”
t0“Rice Productivity”