Abstract
A 7-year field experiment under a rice-wheat rotation system was conducted at Guanghan County in the Chengdu Plain of China from 2004 to investigate the long-term effect of different combinations of year-round tillage patterns and crop straw management on grain yield and quality of wheat. Treatments were rotary-till wheat + rotary-till rice without any straw (conventional treatment, CK), zero-till wheat with rice straw mulching + rotary-till rice with no wheat straw (WZRR), zero-till wheat with rice straw mulching + rotary-till rice with no wheat straw + autumn vegetable (WZRRV), zero-till wheat with rice straw mulching + zero-till rice with wheat straw mulching (WZRZ), and zero-till wheat with rice straw mulching + zero-till rice with wheat straw mulching under ridge-till (WRZB). There was little variation amongst years in grain yield and yield components with the treatment, while CK had lower yields in most years than other treatments with a slight decreasing trend; spike numbers per area had no significant change with the elapse of time. An obvious descending trend in grain number per spike and grains per area for CK and increase in 1000-grain weight for all treatments were observed; zero tillage and straw mulching improved wheat tiller ability, soil available nitrogen, phosphorus, and potassium contents at major growth stages, and leaf area index, SPAD, a portable chlorophyll meter reading, and dry matter at middle and late stages. Most grain quality traits of wheat were nearly the same in all treatments in all year-round tillage patterns.
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Claims 8
Claim · model-written summary
Conventional treatment had lower wheat yields in most years than other treatments.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- CKe0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- most yearse0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CK had lower yields in most years than other treatments with a slight decreasing trend”
t0“Wheat”
Claim · model-written summary
Spike numbers per area did not change significantly over time.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- spike numbers per areae0
- Direction
- no significant changee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spike numbers per area had no significant change with the elapse of time”
t0“Wheat”
Claim · model-written summary
Grain number per spike and grains per area declined for CK.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- grain number per spike and grains per areae0
- Direction
- descendinge0
- Qualifier
- CKe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An obvious descending trend in grain number per spike and grains per area for CK”
t0“Wheat”
Claim · model-written summary
Thousand-grain weight increased for all treatments.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- 1000-grain weighte0
- Direction
- increasee0
- Qualifier
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in 1000-grain weight for all treatments”
t0“Wheat”
Claim · model-written summary
Zero tillage and straw mulching improved wheat tiller ability.
- Taxon
- wheatTriticum aestivume0
- Treatment
- zero tillage and straw mulchinge0
- Outcome
- tiller abilitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zero tillage and straw mulching improved wheat tiller ability”
Claim · model-written summary
Zero tillage and straw mulching improved soil available nitrogen, phosphorus and potassium at major growth stages.
- Taxon
- wheatTriticum aestivume0
- Treatment
- zero tillage and straw mulchinge0
- Outcome
- soil available nitrogen, phosphorus, and potassium contentse0
- Direction
- improvede0
- Qualifier
- major growth stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zero tillage and straw mulching improved wheat tiller ability, soil available nitrogen, phosphorus, and potassium contents at major growth stages”
Claim · model-written summary
Zero tillage and straw mulching improved leaf area index, SPAD and dry matter at middle and late stages.
- Taxon
- wheatTriticum aestivume0
- Treatment
- zero tillage and straw mulchinge0
- Outcome
- leaf area index, SPAD, a portable chlorophyll meter reading, and dry mattere0
- Direction
- improvede0
- Qualifier
- middle and late stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zero tillage and straw mulching improved wheat tiller ability, soil available nitrogen, phosphorus, and potassium contents at major growth stages, and leaf area index, SPAD, a portable chlorophyll meter reading, and dry matter at middle and late stages”
Claim · model-written summary
Most wheat grain quality traits were nearly the same across year-round tillage patterns.
- Taxon
- wheatTriticum aestivume0
- Outcome
- grain quality traitse0
- Direction
- nearly the samee0
- Qualifier
- all year-round tillage patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most grain quality traits of wheat were nearly the same in all treatments in all year-round tillage patterns”
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