Abstract
Two O. indica hybrid rice cultivars,Xinongou 1 characterized with high tiller and Gangyou 725 characterized with high yield potential,were used to investigate the compensation capacity of tillering and production of main stem nodes by artificially specific tiller removal treatment in the initial tillering stage under population condition. The tiller removal treatments included the early tiller emerge that doesn' t remove any tiller,the middle tiller emerge that removes the first primary tiller,and the later tiller emerge that removes the first and second primary tillers. The result showed that the canopy light distribution is an important environment factor affecting the compensational capacity of tillering,and the tillering compensational capacity of upper node group was higher than that of middle and low node group under enough water and fertilizer. Compared with the early tiller emerge treatment,in the morphological characteristics,the later tiller emerge treatment reduced the leaf area index,improved the light intensity or quality of stem base,delayed the shade escape,and promoted the differentiation and growth of upper node tiller,increased the growth potential and effective tiller multiple in the upper node group and increased the single stem leaf area in the heading stage. However,the tiller development characteristic of upper node group reduced the effective panicles and leaf area index,so the absolute compensation capacity was low. In the ecological and physiological characteristics,the canopy light distribution,chlorophyll and protein content increased,and the activity of cell protective enzymes( superoxide dismutase,SOD; catalase,CAT) drop slowly,and the leaf senescence rate delayed,whereas the light penetration loss rate increased and the light interception rate decreased. In the material production and distribution,the leaf net assimilation rate( NAR) increased,assimilation allocation was reasonable,and the economic coefficient had an increasing tendency. The leaf area index reduced,the crop growth rate( CGR) decreased,dry matter accumulation significantly decreased,and the coordination between material production and distribution changed. In the present experiment condition,no significant difference of economic yield existed between the early tiller emerge treatment and the middle tiller emerge treatment,but extremely significant difference of economic yield existed between the early tiller emerge treatment and the later tiller emerge treatment. The present study indicated that the big seedlings have some extent compensation ability of tillering for the biotic and abiotic stress like the artificially specific tiller removal in the initial tillering stage,and the compensation ability exhibited in increasing the growth potential in the tillering stage,increasing the single stem leaf area and canopy light distribution in the heading stage,and delaying the last leaf senescence rate and increasing the NAR and economic coefficient in the mature stage.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.
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 15
Claim · model-written summary
Upper node tillers had greater compensation than middle and lower nodes.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- upper node groupe0
- Outcome
- tillering compensational capacitye0
- Direction
- highere0
- Comparator
- middle and low node groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tillering compensational capacity of upper node group was higher than that of middle and low node group under enough water and fertilizer”
t0“rice”
Claim · model-written summary
Later tiller removal reduced leaf area index.
- Taxon
- riceOryza sativat0
- Treatment
- later tiller emerge treatmente0
- Outcome
- leaf area indexe0
- Direction
- reducede0
- Comparator
- early tiller emerge treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the later tiller emerge treatment reduced the leaf area index”
t0“rice”
e1“no significant difference of economic yield existed between the early tiller emerge treatment and the middle tiller emerge treatment”
Claim · model-written summary
Later tiller removal improved stem-base light and delayed shade escape.
- Taxon
- riceOryza sativat0
- Treatment
- later tiller emerge treatmente1
- Outcome
- light intensity or quality of stem base,delayed the shade escapee0
- Direction
- improvede0
- Comparator
- early tiller emerge treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improved the light intensity or quality of stem base,delayed the shade escape”
t0“rice”
e1“the later tiller emerge treatment reduced the leaf area index”
e2“no significant difference of economic yield existed between the early tiller emerge treatment and the middle tiller emerge treatment”
Claim · model-written summary
Later tiller removal promoted upper node tiller differentiation and growth.
- Taxon
- riceOryza sativat0
- Treatment
- later tiller emerge treatmente1
- Outcome
- differentiation and growth of upper node tillere0
- Direction
- promotede0
- Comparator
- early tiller emerge treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoted the differentiation and growth of upper node tiller”
t0“rice”
e1“the later tiller emerge treatment reduced the leaf area index”
e2“no significant difference of economic yield existed between the early tiller emerge treatment and the middle tiller emerge treatment”
Claim · model-written summary
Upper node tiller development reduced effective panicles and leaf area index.
- Taxon
- riceOryza sativat0
- Organ / stage
- upper node groupe0
- Outcome
- effective panicles and leaf area indexe0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tiller development characteristic of upper node group reduced the effective panicles and leaf area index”
t0“rice”
Claim · model-written summary
Canopy light distribution, chlorophyll and protein content increased.
- Taxon
- riceOryza sativat0
- Outcome
- canopy light distribution,chlorophyll and protein contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the canopy light distribution,chlorophyll and protein content increased”
t0“rice”
Claim · model-written summary
Leaf senescence was delayed and protective enzyme activity declined slowly.
- Taxon
- riceOryza sativat0
- Outcome
- activity of cell protective enzymes( superoxide dismutase,SOD; catalase,CAT)e0
- Direction
- drop slowlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the activity of cell protective enzymes( superoxide dismutase,SOD; catalase,CAT) drop slowly,and the leaf senescence rate delayed”
t0“rice”
Claim · model-written summary
Light penetration loss increased and interception decreased.
- Taxon
- riceOryza sativat0
- Outcome
- light penetration loss ratee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light penetration loss rate increased and the light interception rate decreased”
t0“rice”
Claim · model-written summary
Light interception rate decreased.
- Taxon
- riceOryza sativat0
- Outcome
- light interception ratee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light interception rate decreased”
t0“rice”
Claim · model-written summary
Leaf net assimilation rate increased.
- Taxon
- riceOryza sativat0
- Outcome
- leaf net assimilation rate( NAR)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf net assimilation rate( NAR) increased”
t0“rice”
Claim · model-written summary
Economic coefficient tended to increase.
- Taxon
- riceOryza sativat0
- Outcome
- economic coefficiente0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“economic coefficient had an increasing tendency”
t0“rice”
Claim · model-written summary
Crop growth rate decreased.
- Taxon
- riceOryza sativat0
- Outcome
- crop growth rate( CGR)e0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop growth rate( CGR) decreased”
t0“rice”
Claim · model-written summary
Dry matter accumulation significantly decreased.
- Taxon
- riceOryza sativat0
- Outcome
- dry matter accumulatione0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter accumulation significantly decreased”
t0“rice”
Claim · model-written summary
Economic yield did not significantly differ between early and middle tiller emergence treatments.
- Taxon
- riceOryza sativat0
- Treatment
- middle tiller emerge treatmente0
- Outcome
- economic yielde0
- Direction
- no significant differencee0
- Comparator
- early tiller emerge treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference of economic yield existed between the early tiller emerge treatment and the middle tiller emerge treatment”
t0“rice”
Claim · model-written summary
Economic yield differed extremely significantly between early and later tiller emergence treatments.
- Taxon
- riceOryza sativat0
- Treatment
- later tiller emerge treatmente0
- Outcome
- economic yielde0
- Comparator
- early tiller emerge treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“extremely significant difference of economic yield existed between the early tiller emerge treatment and the later tiller emerge treatment”
t0“rice”
The same questions in other papers
tillage · quality: general · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- no effect
10 papers more in this group
See all 14 papers →tillage · growth · Oryza sativa (rice)Positive and negative results
115 papers in the same direction as this paper · 31 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
145 papers more in this group
See all 149 papers →tillage · yield · Oryza sativa (rice)Positive and negative results
586 papers in the same direction as this paper · 115 in the opposite direction · 27 reporting no difference from an alternative
- negative
- negative
- negative
725 papers more in this group
See all 729 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.