Abstract
Weed control in paddy fields is a worldwide problem and mechanical weeding will become a major weeding method in non-chemical weeding. A mechanical weeder was designed and tested to improve the efficiency of mechanical weeding and reduce the application of herbicides in this study. The weeding equipment is equipped with three sets of inter-row weeding parts which include ground-contoured-following pressing-grass float (GPF), weeding roller, and so on. The weeding principle of weeding part is that the weeding equipment enters the inter-row area with weeder moving forward, then the GPF overwhelms the weeds in the inter-row area to improve the probability that the weeding roller behind the GPF pressed the overwhelmed weeds into the soil. The effects of weeding methods on the plant height, grain yield and quality attributes were investigated in a two-seasonal field experiment. Three weeding methods were applied in the present study: no-weeding, chemical weeding and mechanical weeding. The results of the two-seasonal field experiment showed that the average weeding rates of mechanical weeders were 87.10% and 87.61% respectively. In both seasons, there was no significant difference among weeding methods on plant height at the early growth stage of rice after weeding, but weeding methods had significant effect on plant height at the late growth stage. The plant height of mechanical weeding was higher at the late growth stage. Weeding methods had significant effects on grain yield, grain number per panicle, seed-setting rate, 1000-grain weight and shoot dry matter accumulation (p 0.05). Grain yield of mechanical weeding was significantly higher than that of no-weeding. There was no significant difference between chemical weeding and mechanical weeding. It can be concluded from the two-seasonal experiment that mechanical weeding had the same effect as chemical weeding on grain yield and rice quality. Keywords: weeder, paddy field, mechanical weeding, grain yield, rice quality DOI: 10.25165/j.ijabe.20221503.6978 Citation: Jiao J K, Wang Z M, Luo H W, Chen G L, Liu H L, Guan J J, et al. Development of a mechanical weeder and experiment on the growth, yield and quality of rice. Int J Agric & Biol Eng, 2022; 15(3): 92–99.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 8
Claim · model-written summary
Mechanical weeders achieved average weeding rates of 87.10% and 87.61% in the two seasons.
- Taxon
- rice
Oryza sativat0 - Outcome
- average weeding ratese0
- Value
- 87.10% and 87.61%e0
- Setting
- two-seasonal field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e0“The results of the two-seasonal field experiment showed that the average weeding rates of mechanical weeders were 87.10% and 87.61% respectively”
Claim · model-written summary
Plant height at the early growth stage of rice did not differ significantly among the weeding methods.
- Taxon
- riceOryza sativat0
- Treatment
- weeding methodse1
- Outcome
- plant height at the early growth stagee1
- Direction
- no significant differencee1
- Comparator
- no-weeding, chemical weeding and mechanical weedinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e1“In both seasons, there was no significant difference among weeding methods on plant height at the early growth stage of rice after weeding, but weeding methods had significant effect on plant height at the late growth stage”
e3“Three weeding methods were applied in the present study: no-weeding, chemical weeding and mechanical weeding”
Claim · model-written summary
Weeding methods had a significant effect on rice plant height at the late growth stage.
- Taxon
- riceOryza sativat0
- Treatment
- weeding methodse1
- Outcome
- plant height at the late growth stagee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e1“In both seasons, there was no significant difference among weeding methods on plant height at the early growth stage of rice after weeding, but weeding methods had significant effect on plant height at the late growth stage”
Claim · model-written summary
Plant height at the late growth stage was higher under mechanical weeding.
- Taxon
- riceOryza sativat0
- Treatment
- mechanical weedinge2
- Outcome
- plant heighte2
- Direction
- highere2
- Qualifier
- at the late growth stagee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e2“The plant height of mechanical weeding was higher at the late growth stage”
Claim · model-written summary
Weeding methods had significant effects on grain yield, grain number per panicle and seed-setting rate.
- Taxon
- riceOryza sativat0
- Treatment
- weeding methodse4
- Outcome
- grain yield, grain number per panicle, seed-setting ratee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e4“Weeding methods had significant effects on grain yield, grain number per panicle, seed-setting rate, 1000-grain weight and shoot dry matter accumulation”
Claim · model-written summary
Weeding methods had significant effects on 1000-grain weight and shoot dry matter accumulation.
- Taxon
- riceOryza sativat0
- Treatment
- weeding methodse4
- Outcome
- 1000-grain weight and shoot dry matter accumulatione4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e4“Weeding methods had significant effects on grain yield, grain number per panicle, seed-setting rate, 1000-grain weight and shoot dry matter accumulation”
Claim · model-written summary
Grain yield under mechanical weeding was significantly higher than under no-weeding.
- Taxon
- riceOryza sativat0
- Treatment
- mechanical weedinge5
- Outcome
- Grain yielde5
- Direction
- significantly highere5
- Comparator
- no-weedinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e5“Grain yield of mechanical weeding was significantly higher than that of no-weeding”
Claim · model-written summary
Mechanical weeding had the same effect as chemical weeding on grain yield and rice quality.
- Taxon
- riceOryza sativat0
- Treatment
- mechanical weedinge6
- Outcome
- grain yield and rice qualitye6
- Direction
- same effecte6
- Comparator
- chemical weedinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth, yield and quality of rice”
e6“mechanical weeding had the same effect as chemical weeding on grain yield and rice quality”
The same questions in other papers
herbicide · growth · Oryza sativa (rice)Results differ
30 papers in the same direction as this paper · 92 reporting no difference from an alternative
- positive
- positive
- positive
119 papers more in this group
See all 123 papers →herbicide · quality: general · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
herbicide · yield · Oryza sativa (rice)Positive and negative results
724 papers in the same direction as this paper · 57 in the opposite direction · 20 reporting no difference from an alternative
- no effect
- negative
- negative
798 papers more in this group
See all 802 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.