Abstract
Some ecological indexes, as roots, stems, leaves and tillers in different growing stages, some soil physical and chemical properties, as soil fertility and soil moisture, and yield formation factors, grain quality, resistance to diseases and lodging in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region. Experiment data indicate that benefits in water saving and yield raising in paddy rice are significant under control irrigation system. The yield on fields with control irrigation reaches 10398 kg/hm 2, an increase of 5.3%, compared to those with conventional irrigation system. 7057.5 m 3/hm 2 of irrigation water is saved at average for per hectare of land, a reduction of 38.8%, compared with the conventional irrigation method. Also, the production quality is improved correspondingly under control irrigation, as content of coarse protein increases by 0.21%, and percentage of integral fine rice rises by 1.59%. At the same time, the disease and lodging resistance of plants under control irrigation are improved obviously. The percentage of disease plants decreased by 19.8%, the percentage of infected leaves reduces by 15.4%, and the lodging rate reduces by 18.3%. The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields, the soil properties in crop root zone can be improved significantly, and a good grow condition for roots, stems, tillers, leaves, ears and grains can be established, and thus a relative reasonable canopy and forage structures can be formed. On the other hand, relative strong stalks is useful to prevent plants from lodging. Under control irrigation, tillers usually form relatively early and grow quickly, percentage of effective tillers and leaf area index increase rationally, ears are larger, number of stuffy grain per ear greater, weight per one thousand of grains higher and production quality better.
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Claims 11
Claim · model-written summary
Control irrigation increased rice yield by 5.3% to 10398 kg/hm 2.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“The yield on fields with control irrigation reaches 10398 kg/hm 2, an increase of 5.3%, compared to those with conventional irrigation system”
Claim · model-written summary
Control irrigation saved irrigation water by 38.8%.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“7057.5 m 3/hm 2 of irrigation water is saved at average for per hectare of land, a reduction of 38.8%, compared with the conventional irrigation method”
e1“The yield on fields with control irrigation”
Claim · model-written summary
Control irrigation raised coarse protein content by 0.21%.
- Taxon
- paddy ricee7
- Treatment
- reasonable adjustment of water layer and soil moisturee1
- Outcome
- content of coarse proteine0
- Direction
- increasese0
- Value
- 0.21%e0
Not reportedComparator
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“content of coarse protein increases by 0.21%”
e1“The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields”
Claim · model-written summary
Control irrigation raised integral fine rice percentage by 1.59%.
- Taxon
- paddy ricee7
- Treatment
- reasonable adjustment of water layer and soil moisturee1
- Outcome
- percentage of integral fine ricee0
- Direction
- risese0
- Value
- 1.59%e0
Not reportedComparator
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“percentage of integral fine rice rises by 1.59%”
e1“The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields”
Claim · model-written summary
Control irrigation lowered diseased plant percentage by 19.8%.
- Taxon
- paddy ricee7
- Treatment
- reasonable adjustment of water layer and soil moisturee1
- Outcome
- percentage of disease plantse0
- Direction
- decreasede0
- Value
- 19.8%e0
Not reportedComparator
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“The percentage of disease plants decreased by 19.8%”
e1“The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields”
Claim · model-written summary
Control irrigation lowered infected leaf percentage by 15.4%.
- Taxon
- paddy ricee7
- Treatment
- reasonable adjustment of water layer and soil moisturee1
- Outcome
- percentage of infected leavese0
- Direction
- reducese0
- Value
- 15.4%e0
Not reportedComparator
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“percentage of infected leaves reduces by 15.4%”
e1“The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields”
Claim · model-written summary
Control irrigation lowered lodging rate by 18.3%.
- Taxon
- paddy ricee7
- Treatment
- reasonable adjustment of water layer and soil moisturee1
- Outcome
- lodging ratee0
- Direction
- reducese0
- Value
- 18.3%e0
Not reportedComparator
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“lodging rate reduces by 18.3%”
e1“The Experimental results reveal that through reasonable adjustment of water layer and soil moisture in paddy rice fields”
Claim · model-written summary
Water and soil moisture adjustment improved root-zone soil properties.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“through reasonable adjustment of water layer and soil moisture in paddy rice fields, the soil properties in crop root zone can be improved significantly”
Claim · model-written summary
Control irrigation led to earlier and faster tiller formation and growth.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“Under control irrigation, tillers usually form relatively early and grow quickly”
Claim · model-written summary
Control irrigation increased effective tiller percentage and leaf area index.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“percentage of effective tillers and leaf area index increase rationally”
Claim · model-written summary
Control irrigation produced larger ears, more grain per ear, and heavier thousand-grain weight.
Verbatim
e7“in paddy rice were surveyed and analyzed systematically in Yellow River Irrigation Area in Ninxia Autonomous region”
e0“ears are larger, number of stuffy grain per ear greater, weight per one thousand of grains higher”
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