Abstract
Two field experiments were conducted for two years (2000 and 2001) at Agronomic Research Area, University of Agriculture Faisalabad (UAF), Pakistan. There were 15 treatment combinations for experiment-I having three plant densities, viz., one seedling hill-1 (PD1), two seedlings hill-1 (PD2) and three seedlings hill-1 (PD3) and five nitrogen rates, viz., 0, (N0); 50, (N50); 100, (N100); 150, (N150); and 200 (N200) kg N ha-1. Experiment-II also included 15 treatments having three plant densities, viz., one seedling hill-1 (PD1), two seedlings hill-1 (PD2) and three seedlings hill-1 (PD3) and five irrigation regimes, viz., 62.5 cm (I1), 77.5 cm (I2), 92.5 cm (I3), 107.5 cm (I4), and 122.5 cm (I5). A randomized complete block design (RCBD) was employed with three repetitions. The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200). The agronomic and economic nitrogen and PAR use efficiencies were also higher in this treatment. In case of experiment-II, the highest biomass and grain yield were obtained in case of treatment having combination of two seedlings hill-1 and 107.5 cm irrigation regime (PD2I107.5). The irrigation application based water productivity ranged from 0.36 kg mm-3 to 0.61 kg mm-1, irrigation plus precipitation based water productivity ranged from 0.32 kg mm-3 to 0.55 kg mm-3 and evapotranspiration based water productivity ranged from 0.65 kg mm-3 to 0.84 kg mm-3 among 15 treatments combination of plant density and irrigation regimes. This study concludes that for increasing the benefits for the resource-poor growers, the integration of crop management practices is an optimum strategy to substantially increase the resources use efficiency under irrigated semiarid environment.
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Claims 10
Claim · model-written summary
The PD2N200 treatment gave the highest biomass.
- Taxon
- Rice
Oryza sativat0 - Treatment
- two seedlings hill-1 and 200 kg N ha-1e0
- Outcome
- biomasse0
- Direction
- higheste0
- Value
- 1438 g m-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200).”
t0“Rice”
Claim · model-written summary
The PD2N200 treatment gave the highest grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- two seedlings hill-1 and 200 kg N ha-1e0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 497 g m-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200).”
t0“Rice”
Claim · model-written summary
The PD2N200 treatment gave the highest crop growth rate.
- Taxon
- RiceOryza sativat0
- Treatment
- two seedlings hill-1 and 200 kg N ha-1e0
- Outcome
- crop growth ratee0
- Direction
- higheste0
- Value
- 15.36 g m-2 d-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200).”
t0“Rice”
Claim · model-written summary
The PD2N200 treatment gave the highest net assimilation rate.
- Taxon
- RiceOryza sativat0
- Treatment
- two seedlings hill-1 and 200 kg N ha-1e0
- Outcome
- net assimilation ratee0
- Direction
- higheste0
- Value
- 4.24 g m-2 d-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results for experiment-I revealed that the highest biomass (1438 g m-2), grain yield (497 g m-2), crop growth rate (15.36 g m-2 d-1), net assimilation rate (4.24 g m-2 d-1) were observed in the treatment having combination of two seedlings hill-1 and 200 kg N ha-1 (PD2N200).”
t0“Rice”
Claim · model-written summary
Agronomic and economic nitrogen and PAR use efficiencies were higher with PD2N200.
- Taxon
- RiceOryza sativat0
- Treatment
- PD2N200e1
- Outcome
- agronomic and economic nitrogen and PAR use efficienciese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The agronomic and economic nitrogen and PAR use efficiencies were also higher in this treatment.”
t0“Rice”
e1“two seedlings hill-1 and 200 kg N ha-1 (PD2N200)”
Claim · model-written summary
The PD2I107.5 treatment gave the highest biomass and grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- two seedlings hill-1 and 107.5 cm irrigation regimee0
- Outcome
- biomass and grain yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest biomass and grain yield were obtained in case of treatment having combination of two seedlings hill-1 and 107.5 cm irrigation regime (PD2I107.5)”
t0“Rice”
Claim · model-written summary
irrigation application based water productivity ranged across the irrigation and density treatments.
- Taxon
- RiceOryza sativat0
- Outcome
- irrigation application based water productivitye0
- Value
- 0.36 kg mm-3 to 0.61 kg mm-1e0
- Qualifier
- 15 treatments combination of plant density and irrigation regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The irrigation application based water productivity ranged from 0.36 kg mm-3 to 0.61 kg mm-1, irrigation plus precipitation based water productivity ranged from 0.32 kg mm-3 to 0.55 kg mm-3 and evapotranspiration based water productivity ranged from 0.65 kg mm-3 to 0.84 kg mm-3 among 15 treatments combination of plant density and irrigation regimes.”
t0“Rice”
Claim · model-written summary
irrigation plus precipitation based water productivity ranged across the irrigation and density treatments.
- Taxon
- RiceOryza sativat0
- Outcome
- irrigation plus precipitation based water productivitye0
- Value
- 0.32 kg mm-3 to 0.55 kg mm-3e0
- Qualifier
- 15 treatments combination of plant density and irrigation regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The irrigation application based water productivity ranged from 0.36 kg mm-3 to 0.61 kg mm-1, irrigation plus precipitation based water productivity ranged from 0.32 kg mm-3 to 0.55 kg mm-3 and evapotranspiration based water productivity ranged from 0.65 kg mm-3 to 0.84 kg mm-3 among 15 treatments combination of plant density and irrigation regimes.”
t0“Rice”
Claim · model-written summary
evapotranspiration based water productivity ranged across the irrigation and density treatments.
- Taxon
- RiceOryza sativat0
- Outcome
- evapotranspiration based water productivitye0
- Value
- 0.65 kg mm-3 to 0.84 kg mm-3e0
- Qualifier
- 15 treatments combination of plant density and irrigation regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The irrigation application based water productivity ranged from 0.36 kg mm-3 to 0.61 kg mm-1, irrigation plus precipitation based water productivity ranged from 0.32 kg mm-3 to 0.55 kg mm-3 and evapotranspiration based water productivity ranged from 0.65 kg mm-3 to 0.84 kg mm-3 among 15 treatments combination of plant density and irrigation regimes.”
t0“Rice”
Claim · model-written summary
The authors recommend integrated crop management to improve resource use efficiency for resource-poor growers.
- Taxon
- RiceOryza sativat0
- Outcome
- integration of crop management practicese0
- Setting
- irrigated semiarid environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the integration of crop management practices is an optimum strategy to substantially increase the resources use efficiency under irrigated semiarid environment”
t0“Rice”
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