Abstract
The purpose of this study is to identify the different effects exerted by planting density and nitrogen fertilization on high-salinity reclaimed paddy fields (RPF) and general paddy fields (GPFs), and to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field. Nitrogen fertilization with high-salt and low-salt soils, an untreated control plot, treatment with 200 kg/ha, 300 kg/ha, and 400 kg/ha, and planting densities of 30 cm × 10 cm and 30 cm × 16 cm, growth, and feed values were investigated. In both experimental locations, there was no significant change in the soil due to N treatment, but in the case of RPF, electrical conductivity (EC) decreased significantly from more than 5 dS/m to up to 2.87 dS/m during the yellow ripe stage due to the influence of floods and concentrated precipitation in the fields. In all soils, as both the amount of N treatment and the planting density increased, there was a proportional relationship in which the number of tillers and the dry weight also increased, with the occurrence of lodging also being increased. The dry weight, as expected, was 1.5 times higher at a planting distance of 10 cm, rather than 16 cm. In addition, in both locations, the N treatment led to an increase in the dry weight, but when N treatment reached 400 kg/ha (2.0), the dry weight decreased instead. Moreover, although there was no clear difference in feed value according to N treatment, in RPF, the neutral detergent fiber (NDF) was higher than 60%, the relative feed value (RFV) was less than 98, and the total digestible nutrient (TDN) was also low, confirming that the quality of rice was higher in GPF.
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Claims 11
Claim · model-written summary
Nitrogen treatment caused no significant change in the soil.
Not reportedComparator
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e1“there was no significant change in the soil due to N treatment”
Claim · model-written summary
Soil electrical conductivity in reclaimed paddy fields decreased significantly, from more than 5 dS/m to up to 2.87 dS/m, during the yellow ripe stage owing to floods and concentrated precipitation.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e2“electrical conductivity (EC) decreased significantly from more than 5 dS/m to up to 2.87 dS/m during the yellow ripe stage due to the influence of floods and concentrated precipitation in the fields”
Claim · model-written summary
Tiller number and dry weight of forage rice increased proportionally with the amount of N treatment in all soils.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e3“In all soils, as both the amount of N treatment and the planting density increased, there was a proportional relationship in which the number of tillers and the dry weight also increased, with the occurrence of lodging also being increased”
Claim · model-written summary
Lodging of forage rice increased with planting density and N treatment.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e3“In all soils, as both the amount of N treatment and the planting density increased, there was a proportional relationship in which the number of tillers and the dry weight also increased, with the occurrence of lodging also being increased”
Claim · model-written summary
Dry weight was 1.5 times higher at a planting distance of 10 cm than at 16 cm.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e4“The dry weight, as expected, was 1.5 times higher at a planting distance of 10 cm, rather than 16 cm”
Claim · model-written summary
N treatment increased the dry weight of forage rice in both locations.
Not reportedComparator
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e5“the N treatment led to an increase in the dry weight, but when N treatment reached 400 kg/ha (2.0), the dry weight decreased instead”
Claim · model-written summary
Dry weight decreased when N treatment reached 400 kg/ha.
Not reportedComparator
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e5“the N treatment led to an increase in the dry weight, but when N treatment reached 400 kg/ha (2.0), the dry weight decreased instead”
Claim · model-written summary
Neutral detergent fiber of forage rice in RPF was higher than 60%.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e6“in RPF, the neutral detergent fiber (NDF) was higher than 60%”
Claim · model-written summary
Relative feed value of forage rice in RPF was less than 98.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e6“in RPF, the neutral detergent fiber (NDF) was higher than 60%”
e7“the relative feed value (RFV) was less than 98, and the total digestible nutrient (TDN) was also low, confirming that the quality of rice was higher in GPF”
Claim · model-written summary
Total digestible nutrient of forage rice in RPF was low.
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e6“in RPF, the neutral detergent fiber (NDF) was higher than 60%”
e7“the relative feed value (RFV) was less than 98, and the total digestible nutrient (TDN) was also low, confirming that the quality of rice was higher in GPF”
Claim · model-written summary
The quality of forage rice was higher in GPF than in RPF.
Not reportedComparator
Verbatim
e0“to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field”
e7“the relative feed value (RFV) was less than 98, and the total digestible nutrient (TDN) was also low, confirming that the quality of rice was higher in GPF”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
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See all 511 papers →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.