Slow-release fertilizer to increase grain N content in spring wheat

Rajala, Ari; Peltonen‐Sainio, Pirjo

doi:10.23986/afsci.8160

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…In this study, the optimal ratio of SRU to CU in the rice season was higher than that in the wheat season, perhaps because sufficient availability of water and heat in the rice season are conducive to the release and transport of SRU nutrients and the decomposition of the residue of the previous crop, allowing higher ratios of SRU to CU [24,25]. However, the low temperature and low rainfall in the wheat season are not conducive to the release of SRU and the decomposition of crop residue, so higher ratios of CU to SRU is generally required to meet the demand for nitrogen by crop residue decomposition and wheat growth in the early growth stage [26][27][28].…”

Section: Discussionmentioning

confidence: 99%

Effect of Combined Application of Slow-Release and Conventional Urea on Yield and Nitrogen Use Efficiency of Rice and Wheat under Full Straw Return

Shen

et al. 2022

Agronomy

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The effects of one-time basal application of different mixtures of slow-release urea (SRU) and conventional urea (CU) on yield and nitrogen use efficiency (NUE) of rice and wheat were investigated to determine the appropriate ratios of SRU to CU for one-time basal fertilization in a rice–wheat rotation farmland under full residue incorporation. A field plot experiment was used in this study. Six treatments were established as follows: CK (no nitrogen fertilizer applied), T0 (100% CU, 50% applied as basal fertilizer and 50% applied as jointing fertilizer), T3 (one-time basal application of SRU and CU mixture with 30% SRU), T5 (one-time basal application of SRU and CU mixture with 50% SRU), T7 (one-time basal application of SRU and CU mixture with 70% SRU), and T10 (one-time basal application of 100% SRU). The results showed that the combined application of SRU and CU increased the yields of rice and wheat. Treatment T7 resulted in the highest rice yield, and T3 resulted in the highest wheat yield, which were 25.6% and 29.4% higher, than those of treatment T0, respectively. Compared with treatment T0 (application of CU alone), the combined application of SRU and CU resulted in 27.4–96.5% and 22.8–57.1% higher NUE in rice and wheat, respectively.

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Section: Discussionmentioning

confidence: 99%

Effect of Combined Application of Slow-Release and Conventional Urea on Yield and Nitrogen Use Efficiency of Rice and Wheat under Full Straw Return

Shen

et al. 2022

Agronomy

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“…The N release of the SF agrees with the crop nutrient requirement, allowing for the coordination of vegetative and reproductive growth, a reduction in nutrient loss, an improvement in N utilization efficiency and a reduction in topdressing labor costs [ 19 ]. In the past decade, studies on rice [ 20 , 21 , 22 , 23 , 24 ] and wheat [ 25 , 26 , 27 , 28 , 29 ] have reported that the application of SF affects the grain quality by changing the concentrations of protein, starch, oil and mineral elements. However, studies have mainly focused on the grain quality while starch structural and functional properties have received less attention [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Starch Physicochemical Properties of Normal Maize under Different Fertilization Modes

Wang

2022

Polymers

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Improving the quality with desired functions of natural starch through agronomic practice will meet the increasing need of people for natural, functional foods. A one-off application of slow-release fertilizer is a simple and efficient practice in maize production, though its influence on the starch quality is scarce. In the present study, the structural and functional properties of the starch of normal maize under two fertilization modes (one-off application of slow-release fertilizer at the sowing time (SF), and three applications of conventional fertilizer at the sowing time, and topdressing at the jointing and flowering stages (CF)) under the same fertilization level (N/P2O5/K2O = 405/135/135 kg/ha) were studied using Jiangyu877 (JY877) and Suyu30 (SY30) as materials. The observed results indicate that the size of starch granules was enlarged by fertilization and the size was the largest under CF in both hybrids. The amylose content was unaffected by CF and reduced by SF in both hybrids. In comparison to no fertilizer (0F), the peak 1/peak 2 ratio was decreased by CF in both hybrids, whereas the ratio under SF was unaffected in JY877 and decreased in SY30. The amylopectin average chain-length was reduced by fertilization and the reduction was higher under CF in JY877. The relative crystallinity was increased by CF in both hybrids and the value under SF was unaffected in SY30 and increased in JY877. The peak, trough, and final viscosities of starch were increased by fertilization in both hybrids. The starch thermal characteristics in response to fertilization modes were dependent on hybrids. The retrogradation enthalpy and percentage were increased by CF in both hybrids, whereas those two parameters under SF were increased in SY30 and decreased in JY877. In conclusion, starch with similar granule size, higher peak 1/peak 2 ratio, and lower relative crystallinity was obtained under SF than under CF for both hybrids. Longer amylopectin chain-length was observed in JY877, which induced lower pasting viscosities in SY30 and lower retrogradation characteristics in JY877.

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“…Lower N availability reduced plant N-content at heading stage. Lower grain and straw N-content and lower plant N-uptake indicate lower N-availability also at grain filling period, (Rajala and Peltonen-Sainio (2013).…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF TRADITIONAL SOLUBLE AND SLOW RELEASE N-FERTILIZERS ON WHEAT & THEIR RESIDUAL EFFECT ON SORGHUM AND BARLEY IN SOME SOILS OF EGYPT

Madkour¹,

Aboul-Defan²,

El-Raies³

2017

Menoufia Journal of Soil Science

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A pot experiment was conducted under greenhouse conditions using pots (perforated at the bottom), with 12 kg soil capacity of each. Pots were seeded with wheat (Triticum aestivum c.v. Sakha 8), to study the effects of traditional soluble-N and slow release-N fertilizers. The soil of each pot was thoroughly mixed with P at a rate of 12 mg P/kg soil. Soil K was in sufficient amount. The experimental pots were contained 288 pots, which arranged in a complete randomized block design with three replicate in four factors of three forms of soil , four N-fertilizers ( two traditional soluble-N and the other two slow release-N fertilizers) , three rates of N-fertilizers as well as two rates of moisture regimes of 70 and 100 WHC . At wheat maturity after 24 weeks-growth, plants in each pot were cut 2-cm above soil surface, carefully washed, dried and weighted. After wheat harvested and in the same pots, in order to study the Nfertilizes residual effect, two successive crops of Sorghum vulgar "c.v. Giza 15" and then barley "Hordium, vulgar c.v. Giza 121" were planted and harvested after 9 and 16 weeks , respectively. The obtained results may be summarized as follows:• The traditional soluble forms of N-fertilizers produced higher dry matter (gm./pot) of wheat crop compared with the slow release forms of N-fertilizers. • Dry weights (gm/pot) of both sorghum and barley were more under fertilization with slow release forms of N-fertilizers, than under fertilization with the traditional soluble forms, with approximately equal to two fold and threefold, respectively. • Slow release forms resulted in less N-uptake by wheat than the traditional soluble forms.While the slow release forms of N-fertilizers affected positively on N-uptake by both of sorghum and barley, with increases approximately equal to twice threefold more than the traditional soluble ones.• Residues of slow release N-fertilizers have appropriate supply of sorghum and barley, at the two successive with amounts of (N), because their ability to continuous supply (N) for long periods of time.

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Slow-release fertilizer to increase grain N content in spring wheat

Cited by 5 publications

References 30 publications

Effect of Combined Application of Slow-Release and Conventional Urea on Yield and Nitrogen Use Efficiency of Rice and Wheat under Full Straw Return

Effect of Combined Application of Slow-Release and Conventional Urea on Yield and Nitrogen Use Efficiency of Rice and Wheat under Full Straw Return

Starch Physicochemical Properties of Normal Maize under Different Fertilization Modes

EFFECT OF TRADITIONAL SOLUBLE AND SLOW RELEASE N-FERTILIZERS ON WHEAT & THEIR RESIDUAL EFFECT ON SORGHUM AND BARLEY IN SOME SOILS OF EGYPT

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