Abstract
Two field experiments were carried out at the Experimental Farm of Rice Research and Training Center (RRTC), Sakha-Kafr El-Sheikh, Egypt, during 2010 and 2011 summer seasons. The objective of this research was to investigate the effects of NPK fertilizers with rice straw compost on growth and grain yield, as well as water productivity (WP) and nitrogen use efficiency of Egyptian hybrid rice cultivar (EHR1) under different irrigation regimes. A split plot design, with four replicates, was used in all experiments. The main plots were devoted to three irrigation regimes; namely, continuous flooding (CF) and irrigation to 5 – 6 cm depth three (3-) and six (6-) days after disappearance of surface water (DADSW). The sub-plots were occupied by six fertilizer treatments; namely, zero fertilizer (T1), 100% of recommended NPK fertilizer (T2), application of two t/h rice straw compost + 25% NPK (T3), 50% NPK (T4), 75% NPK (T5) and 100% NPK (T6). The main results indicated that CF and 3-DADSW treatments registered significant and higher values of growth attributes, grain yield and most of its attributes, as well as protein content and N-uptake, compared with 6-DADSW treatment, except for number of days to 50% heading and unfilled grain (%). Dry matter, LAI, plant height and grain yield and most of its attributes, as well as protein content and N-uptake, were significantly enhanced by the application of 100% NPK, along with rice straw compost at two t/ha (T6), which was at per with T2 (100% NPK) and T5 (75 % NPK + 2 t/h rice straw compost). Under all irrigation regimes, application of NPK fertilizer, either alone or with rice straw compost, recorded higher grain yield and WP than the control treatment. CF consumed the highest amount of irrigation water, while, application of 3- and 6-DADSW tended to decrease the amount of water used. Furthermore, 3-DADSW recorded the highest WP (0.84 and 0.86 kg/m3) and the minimum grain yield reduction (4.59 and 6.41 %) with water saved about 11.55 and 11.12 % compared to CF in both seasons, respectively. Generally, under the same experimental conditions, it was concluded to use 3-DADSW irrigation with adding 75% NPK, along with rice straw compost at two t/ha for reasonable grain yield and high WP, as well as it could decrease chemical fertilizer input by 25 % from the present recommended application without decreasing rice grain yield.
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Claims 11
Claim · model-written summary
Continuous flooding and 3-DADSW increased growth attributes, grain yield and most yield attributes versus 6-DADSW.
- Taxon
- RICE
Oryza sativat0 - Treatment
- CF and 3-DADSWe0
- Outcome
- growth attributes, grain yield and most of its attributese0
- Direction
- highere0
- Comparator
- 6-DADSWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CF and 3-DADSW treatments registered significant and higher values of growth attributes, grain yield and most of its attributes, as well as protein content and N-uptake, compared with 6-DADSW treatment”
t0“RICE CULTIVAR”
Claim · model-written summary
Continuous flooding and 3-DADSW increased protein content and N uptake versus 6-DADSW.
- Taxon
- RICEOryza sativat0
- Treatment
- CF and 3-DADSWe0
- Outcome
- protein content and N-uptakee0
- Direction
- highere0
- Comparator
- 6-DADSWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CF and 3-DADSW treatments registered significant and higher values of growth attributes, grain yield and most of its attributes, as well as protein content and N-uptake, compared with 6-DADSW treatment”
t0“RICE CULTIVAR”
Claim · model-written summary
The 100% NPK and compost treatment enhanced dry matter, leaf area index, plant height, grain yield and yield attributes.
- Taxon
- RICEOryza sativat0
- Treatment
- 100% NPK, along with rice straw compost at two t/hae0
- Outcome
- Dry matter, LAI, plant height and grain yield and most of its attributese0
- Direction
- enhancede0
- Comparator
- T2 (100% NPK) and T5 (75 % NPK + 2 t/h rice straw compost)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter, LAI, plant height and grain yield and most of its attributes, as well as protein content and N-uptake, were significantly enhanced by the application of 100% NPK, along with rice straw compost at two t/ha (T6), which was at per with T2 (100% NPK) and T5 (75 % NPK + 2 t/h rice straw compost).”
t0“RICE CULTIVAR”
Claim · model-written summary
The 100% NPK and compost treatment enhanced protein content and N uptake.
- Taxon
- RICEOryza sativat0
- Treatment
- 100% NPK, along with rice straw compost at two t/hae0
- Outcome
- protein content and N-uptakee0
- Direction
- enhancede0
- Comparator
- T2 (100% NPK) and T5 (75 % NPK + 2 t/h rice straw compost)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protein content and N-uptake, were significantly enhanced by the application of 100% NPK, along with rice straw compost at two t/ha (T6), which was at per with T2 (100% NPK) and T5 (75 % NPK + 2 t/h rice straw compost).”
t0“RICE CULTIVAR”
Claim · model-written summary
NPK fertilizer alone or with compost increased grain yield and water productivity under all irrigation regimes compared with control.
- Taxon
- RICEOryza sativat0
- Treatment
- application of NPK fertilizer, either alone or with rice straw composte0
- Outcome
- grain yield and WPe0
- Direction
- highere0
- Qualifier
- Under all irrigation regimese0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under all irrigation regimes, application of NPK fertilizer, either alone or with rice straw compost, recorded higher grain yield and WP than the control treatment.”
t0“RICE CULTIVAR”
Claim · model-written summary
Continuous flooding consumed the most irrigation water.
- Taxon
- RICEOryza sativat0
- Treatment
- CFe0
- Outcome
- amount of irrigation watere0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CF consumed the highest amount of irrigation water”
t0“RICE CULTIVAR”
Claim · model-written summary
Irrigation at 3 and 6-DADSW tended to decrease water use.
- Taxon
- RICEOryza sativat0
- Treatment
- 3- and 6-DADSWe0
- Outcome
- amount of water usede0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 3- and 6-DADSW tended to decrease the amount of water used”
t0“RICE CULTIVAR”
Claim · model-written summary
The 3-DADSW regime achieved the highest water productivity, 0.84 and 0.86 kg/m3 across two seasons.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3-DADSW recorded the highest WP (0.84 and 0.86 kg/m3)”
t0“RICE CULTIVAR”
Claim · model-written summary
The 3-DADSW regime had the minimum grain yield reduction, 4.59 and 6.41%, compared with continuous flooding.
- Taxon
- RICEOryza sativat0
- Treatment
- 3-DADSWe0
- Outcome
- grain yield reductione0
- Direction
- minimume0
- Value
- 4.59 and 6.41 %e0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3-DADSW recorded the highest WP (0.84 and 0.86 kg/m3) and the minimum grain yield reduction (4.59 and 6.41 %) with water saved about 11.55 and 11.12 % compared to CF in both seasons”
t0“RICE CULTIVAR”
Claim · model-written summary
The 3-DADSW regime saved 11.55 and 11.12% water compared with continuous flooding.
- Taxon
- RICEOryza sativat0
- Treatment
- 3-DADSWe0
- Outcome
- water savede0
- Direction
- savede0
- Value
- 11.55 and 11.12 %e0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3-DADSW recorded the highest WP (0.84 and 0.86 kg/m3) and the minimum grain yield reduction (4.59 and 6.41 %) with water saved about 11.55 and 11.12 % compared to CF in both seasons”
t0“RICE CULTIVAR”
Claim · model-written summary
The authors recommend 3-DADSW with 75% NPK and compost for reasonable grain yield, high water productivity and reduced chemical fertilizer input.
- Taxon
- RICEOryza sativat0
- Outcome
- use 3-DADSW irrigation with adding 75% NPK, along with rice straw compost at two t/hae0
- Value
- 25 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was concluded to use 3-DADSW irrigation with adding 75% NPK, along with rice straw compost at two t/ha for reasonable grain yield and high WP, as well as it could decrease chemical fertilizer input by 25 % from the present recommended application without decreasing rice grain yield”
t0“RICE CULTIVAR”
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