Deep placement of urea supergranules in transplanted rice: Principles and practices

Savant, N. K.; Stangel, P. J.

doi:10.1007/bf01063765

Cited by 116 publications

(72 citation statements)

References 70 publications

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“…As P is relatively immobile in soils, and roots can deplete P only from a distance that coincides approximately with the length of the root hair. This finding is in agreement with the findings of Savant and Stangel (1990) who reported that rice roots tend to proliferate near the placement point of urea supergranule and to increase during many weeks after urea placement. Soil type also affected N, P and K uptake.…”

Section: Rice Yieldssupporting

confidence: 83%

Increasing Nitrogen Availability for Rice Growth in Irrigated System in Sourou Valley (Burkina Faso)

Alimata¹,

Bidjokazo²,

Youl³

2016

IJEAB

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Section: Rice Yieldssupporting

confidence: 83%

Increasing Nitrogen Availability for Rice Growth in Irrigated System in Sourou Valley (Burkina Faso)

Alimata¹,

Bidjokazo²,

Youl³

2016

IJEAB

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“…Urea super granule (USG), a physical modification of ordinary urea, is considered a slowly available N fertilizer and found efficient when properly deep placed (Savant and Stangel, 1990). Urea super granule (USG), a slow releasing nitrogenous fertilizer is being marketed in Bangladesh as a source of nitrogen.…”

Section: Introductionmentioning

confidence: 99%

A comparative appraisal of urea super granule application in raised bed and prilled urea application in conventional planting for transplanted boro rice (Oryza sativa)

Bhuyan

Ferdousi²,

Iqbal

et al. 2016

JAA

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I S S N 2 3 4 9 -0 8 3 7 V o l u m e 6 N u m b e r 1 J o u r n a l o f A d v a n c e s i n A g r i c u l t u r e 822 | P a g e C o u n c i l f o r I n n o v a t i v e R e s e a r c h A p r i l 2 0 1 6 w w w . c i r w o r l d . AbstractUtilization of urea super granule (USG) with raised bed cultivation system for transplanted boro (winter, irrigated) rice production is a major concern now days. A field experiment was conducted in the chuadanga district of Bangladesh to compare the two cultivation methods: deep placement of USG on raised bed with boro rice, and prilled urea (PU) broadcasting in conventional planting. Results showed that USG in raised bed planting increased grain yields of transplanted boro rice by up to 18.18% over PU in conventional planting. Deep placement of USG in raised bed planting increased the number of panicle m -2 , number of grains panicle -1 and 1000-grains weight of boro rice than the PU in conventional planting. Better plant growth was observed by deep placement of USG in raised bed planting compared to PU in conventional planting. Sterility percentage and weed infestation were lower on USG in raised bed planting compared to the PU in conventional planting methods. Forty seven percent irrigation water and application time could be saved by USG in raised bed planting than PU in conventional planting. Deep placement of USG in bed saved N fertilizer consumption over conventional planting. Water use efficiency for grain and biomass production was higher with deep placement of USG in bed planting than the PU broadcasting in conventional planting methods. Similarly, agronomic efficiency of N fertilizer by USG in bed planting was significantly higher than the PU broadcasting in conventional planting. This study concluded that deep placement of USG in raised bed planting for transplanted boro rice is a new approach to achieve fertilizer and water use efficiency as well as higher yield and less water input compared to existing agronomic practices in Bangladesh.

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“…According to Savant and Stangel (1990), this must combine locally with a very strong ammonium concentration gradient in the soil-urea reaction zone. When growth begins, the plant's roots will avoid this area and, at a time when the plant's needs are low, the nitrogen will be stored in the soil's reserves.…”

Section: Journal Of Agricultural Studiesmentioning

confidence: 99%

“…However, the positive results may be offset by increased production costs (Chien et al, 2009). Some of the most affordable methods include urea mixed with various substances in the form of balls (neem cake or mud balls) or simply granules (USG, urea supergranules) weighing between l g and 3 g (Savant and Stangel, 1990;Bandaogo et al, 2015). The efficiency of the various formats can be strengthened by the means and date of application.…”

Section: Introductionmentioning

confidence: 99%

Comparative Effects of the Application of Prilled Urea and Urea Supergranules on Flooded Rice in Madagascar

D'Onofrio¹,

Dupuy²,

Gaudin³

2018

JAS

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Applying urea supergranules to flooded rice (10 cm deep, 3 weeks after transplantation) is associated with yield increases of 17%, 23%, 22% and 16% (for doses of 27, 54, 81 and 108 units of nitrogen per hectare) compared with prilled urea. Nitrogen-15 can be used to establish the real nitrogen utilization coefficients for the aerial parts of the plant. While the figures are very low for prilled urea (between 4% and 9%), they exceed 25% and 38% for supergranules on the sites studied. The effect of fertilizer form is greater than the dosage factor. The results are discussed in terms of apparent utilization coefficients and mechanism used.

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Deep placement of urea supergranules in transplanted rice: Principles and practices

Cited by 116 publications

References 70 publications

Increasing Nitrogen Availability for Rice Growth in Irrigated System in Sourou Valley (Burkina Faso)

Increasing Nitrogen Availability for Rice Growth in Irrigated System in Sourou Valley (Burkina Faso)

A comparative appraisal of urea super granule application in raised bed and prilled urea application in conventional planting for transplanted boro rice (Oryza sativa)

Comparative Effects of the Application of Prilled Urea and Urea Supergranules on Flooded Rice in Madagascar

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