Effect of Water Management and Polyolefin-Coated Urea on Growth and Nitrogen Uptake of Indica Rice

Fashola, Oluwarotimi O.; Hayashi, Keiichi; Wakatsuki, Toshiyuki

doi:10.1081/pln-120014069

Cited by 28 publications

(11 citation statements)

References 9 publications

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“…Also high temperature may have also resulted in the volatile loss of the nitrogen. Fashola et al (2002) observed that runoff and leaching could greatly reduce the level of nitrogen in rainfed rice field.…”

Section: Resultsmentioning

confidence: 97%

“…In some West African ecology, some researchers (Hirose and Wakatsuki 1997;Buri et al 2000) have observed low nutrient content of the soils. Fashola et al (2002) noted that poor water management and high nitrogen losses due to high temperature, leaching and runoff are some of the key problems faced by rice farmers under rainfed inland valley systems. They remarked that the use of fertilizers among farmers in West Africa is low, probably due to socio-economic factors.…”

Section: Introductionmentioning

confidence: 98%

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Evaluation of sawah rice management system in an inland valley in southeastern Nigeria. I: Soil chemical properties and rice yield

Nwite

Igwe

Wakatsuki

2008

Paddy Water Environ

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Failures in agricultural development in parts of West Africa may have been caused by the inability of the farmers to develop the abundant inland valleys for cultivation of such crops like rice, using appropriate water management systems. An inland valley in southeastern Nigeria was used to evaluate the influence of sawah and non-sawah water management using inorganic and organic soil amendments on the soil chemical properties and rice grain yield. Soil chemical properties tested were soil organic carbon, total nitrogen, pH, exchangeable K + , Ca 2+ and Mg 2+ . Others were CEC, percent base saturation and exchangeable acidity while the grain yield of rice was also measured. The soils are loose, low in pH and poor in plant nutrient elements. In spite of that, the sawah-managed system was able to improve the pH of the soil by raising it slightly both in the first and second year of planting. Generally, essential plant nutrients such as exchangeable K + , Ca 2+ and Mg 2+ , including fertility index like the CEC, were improved within sawah management within the period. Also, rice grain yield increased significantly (5.62 and 6.25 tons/ha in the first year and 5.32 and 6.53 tons/ha in the second year for non-sawah and sawah, respectively) with sawah system such that about 11 and 23% yield increases were obtained in sawah over the non-sawah in the two years, respectively. Although organic carbon can be used to explain the variation in total grain yield in the first year, it was the CEC that explained the total grain yield in the second year. The study revealed the superiority of sawah over non-sawah in the production of lowland rice in an inland valley in southeastern Nigeria.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Evaluation of sawah rice management system in an inland valley in southeastern Nigeria. I: Soil chemical properties and rice yield

Nwite

Igwe

Wakatsuki

2008

Paddy Water Environ

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“…Polymer-coated urea (PCU) is such an SCRF designed to synchronize N release and crop N uptake with minimum side effects. Several polymer-coated fertilizers have already been tested for crops, such as potato (Pack et al 2006;Hutchinson et al 2003), onion (Drost et al 2002), wheat (El-Sirafy et al 2006Malhi et al 2003), barley (Zhang et al 2000;Nyborg et al 1999), rice (Singh et al 2007;Tang et al 2007;Kondo et al 2005;Acquaye and Inubushi 2004;Carreres et al 2003;Fashola et al 2002;Sato et al 1993;Blaise and Prasad 1996;Shoji and Kanno 1994), etc. As the use of PCU is spreading into a wide range of crops, researchers are more concerned about how to design the fertilizers as per the specific needs of a crop so as to achieve maximum recovery efficiency.…”

Section: Introductionmentioning

confidence: 98%

Performance of polymer-coated urea in transplanted rice: effect of mixing ratio and water input on nitrogen use efficiency

Patil

Das

Barak³

et al. 2010

Paddy Water Environ

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Polymer-coated urea (PCU) is an important alternative to uncoated urea for improving nitrogen (N) use efficiency (NUE). Only a few studies discuss their utility for lowland rice systems. A 2-year field study was conducted to examine if nitrogen loading is reduced in lowland rice ecosystem by using mixture of PCU and uncoated urea without sacrificing yield. Five treatments involving two mixtures of PCU with 50 and 70% coated urea each at 70 and 50% of recommended dose (80 kg N ha -1 ) and one with uncoated urea at 100% recommended dose were laid out in a completely randomized design. Selected plant growth parameters and plant available N contents (NH 4 -N plus NO 3 -N) in soil solution and ponded water were measured over a period of 65 days after transplanting.

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“…Because upland rice is usually planted at the onset of the rainy season, mineralized soil N is usually high in the early growth stage and lower afterward. Recently, a polyolefin resincoated controlled-release N fertilizer was proven to be effective for improving N recovery with one or a few applications in irrigated lowland rice and vegetable crops (Fashola et al, 2002;Kamekawa et al, 1990;Kaneta, 1995;Shoji and Kanno, 1994). The timing of N application should meet the demand by the plant, but this is often not feasible due to unpredictable rainfall.…”

Section: Introductionmentioning

confidence: 99%

Yield Response to Urea and Controlled-Release Urea as Affected by Water Supply in Tropical Upland Rice

Kondo

Singh²,

Agbisit

et al. 2005

Journal of Plant Nutrition

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Nitrogen (N) deficiency and water stress are major abiotic constraints upon the production of upland rice (Oryza sativa L.) in tropical Asia. It is, therefore, imperative to quantify the effect of N input on yield and to identify factors affecting the variability of yield response to N under various water supply conditions in order to develop efficient methods of N and crop management. Field experiments were conducted in Bihar, India, over four years to analyze the effect of N rate with split application of soluble urea, and a N sources, split application of soluble urea, and a single application of polyolefin resin-coated controlled-release urea (PCU) on the grain yield, apparent N recovery fraction (ANR), economic N use efficiency (grain yield per N uptake or GYNUE), and root growth. The yield responded linearly to increasing N rate in split urea, but along a different slope in each year. The yield response to N rate was variable among years due to variations in ANR and GYNUE. A significant relationship between the ANR and yield gain by N application across years indicated the importance of improving ANR to maximize the cost-benefit ratio. A comparison of split urea and PCU indicated that ANR could be improved more by the application of PCU than by split urea, especially under a high water supply from rainfall or irrigation. This is probably due to less N having been lost due to runoff and leaching when PCU was used. GYNUE was relatively stable across N treatments, but showed significant year-to-year variation, caused by variations in both the biomass N use efficiency (BNUE) (aboveground dry weight per N uptake) and harvest index (HI) as affected by rainfall conditions. The application of N increased root length from the surface to a below-45 cm depth, which may have contributed to the water exploitation under water stress.

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Effect of Water Management and Polyolefin-Coated Urea on Growth and Nitrogen Uptake of Indica Rice

Cited by 28 publications

References 9 publications

Evaluation of sawah rice management system in an inland valley in southeastern Nigeria. I: Soil chemical properties and rice yield

Evaluation of sawah rice management system in an inland valley in southeastern Nigeria. I: Soil chemical properties and rice yield

Performance of polymer-coated urea in transplanted rice: effect of mixing ratio and water input on nitrogen use efficiency

Yield Response to Urea and Controlled-Release Urea as Affected by Water Supply in Tropical Upland Rice

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