Abstract
To enhance Bt hybrid cotton production in Shandong province, high-yielding mechanism and cultivation techniques for Bt hybrid cotton were studied with 2 hybrid and 6 non-hybrid Bt cotton varieties from 2001 to 2004. The results of average across 4 years showed that lint yield in Bt hybrid cotton was increased by 10%～20% through incorporation of three yield components relative to that in non-hybrid Bt cotton. Yield increase was mainly attributed to significantly higher leaf area index, faster dry matter accumulation and slighter mid-day depression of photosynthesis in hybrid cotton. However, Bt hybrid cotton exhibited more severe premature senescence particularly in drought years due to heavier boll load and lower roots/stems ratio than the control cotton 33B. Based on an integrated analysis of ecological and production conditions in Shandong, we proposed that the southwest of Shandong could be an optimum area for Bt hybrid cotton production and should be developed intensively, the north west of Shandong is a relatively suitable area to grow and should be developed moderately, but other areas should be restricted in growing hybrid cotton. Currently Bt hybrid cotton growing can be managed with a super high yielding system through intensive input or a cost-saving system.
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Claims 6
Claim · model-written summary
Lint yield of Bt hybrid cotton increased by 10-20% relative to non-hybrid Bt cotton.
Verbatim
e1“lint yield in Bt hybrid cotton was increased by 10%～20% through incorporation of three yield components relative to that in non-hybrid Bt cotton”
Claim · model-written summary
Leaf area index was significantly higher in hybrid cotton than in non-hybrid Bt cotton.
- Taxon
- hybrid cotton
Gossypium hirsutume1 - Treatment
- hybrid cottone1
- Outcome
- leaf area indexe1
- Direction
- highere1
- Comparator
- non-hybrid Bt cottone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yield increase was mainly attributed to significantly higher leaf area index, faster dry matter accumulation and slighter mid-day depression of photosynthesis in hybrid cotton”
e2“relative to that in non-hybrid Bt cotton”
Claim · model-written summary
Dry matter accumulation was faster in hybrid cotton than in non-hybrid Bt cotton.
- Taxon
- hybrid cottonGossypium hirsutume1
- Treatment
- hybrid cottone1
- Outcome
- dry matter accumulatione1
- Direction
- fastere1
- Comparator
- non-hybrid Bt cottone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yield increase was mainly attributed to significantly higher leaf area index, faster dry matter accumulation and slighter mid-day depression of photosynthesis in hybrid cotton”
e2“relative to that in non-hybrid Bt cotton”
Claim · model-written summary
Mid-day depression of photosynthesis was slighter in hybrid cotton than in non-hybrid Bt cotton.
- Taxon
- hybrid cottonGossypium hirsutume1
- Treatment
- hybrid cottone1
- Outcome
- mid-day depression of photosynthesise1
- Direction
- slightere1
- Comparator
- non-hybrid Bt cottone2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Yield increase was mainly attributed to significantly higher leaf area index, faster dry matter accumulation and slighter mid-day depression of photosynthesis in hybrid cotton”
e2“relative to that in non-hybrid Bt cotton”
Claim · model-written summary
Bt hybrid cotton showed more severe premature senescence than the control cotton 33B, particularly in drought years.
Verbatim
e1“Bt hybrid cotton exhibited more severe premature senescence particularly in drought years due to heavier boll load and lower roots/stems ratio than the control cotton 33B”
Claim · model-written summary
Premature senescence of Bt hybrid cotton is attributed to heavier boll load and lower roots/stems ratio.
Verbatim
e1“Bt hybrid cotton exhibited more severe premature senescence particularly in drought years due to heavier boll load and lower roots/stems ratio than the control cotton 33B”
The same questions in other papers
transgenic · quality: postharvest · Gossypium hirsutum (cotton)Positive and negative results
1 in the opposite direction
- 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.