Effect of placement of coated urea fertilizer on root growth and rubidium uptake activity in soybean plant

Chinushi, Toshiaki; Nakano, Tomio; Hagino, Kohji; Ohyama, Takuji

doi:10.1080/00380768.1991.10416942

Cited by 21 publications

(20 citation statements)

References 6 publications

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“…The stimulatory effects of deep placement of CU‐100 on growth, N 2 fixation and seed yield in rotated paddy field was first published by Takahashi et al. (1991b, 1992).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the deep placement of CU‐100 promoted the shoot growth and kept LAI higher during reproductive stage (Takahashi et al. 1991a) and promoted the root growth as well as Rb uptake activity in the deep place (Takahashi et al1991b, Takahashi and Ohyama 1999). Based on N balance method with nodulating and non‐nodulating isoline (Takahashi et al.…”

Section: Discussionmentioning

confidence: 99%

“…Deep placement of CaCN 2 and CU‐100 appeared to promote the growth of deep roots by supplying N in the deep layers of soil, which consequently enhanced plant growth. The active development of roots in the deep layers may have enabled them to absorb nutrients and water from the deep layers of the soil (Takahashi et al. 1991b).…”

Section: Dry Weight Of Shoot Root and Nodules And The Respective N Cmentioning

confidence: 99%

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Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Tewari¹,

Suganuma²,

Fujikake³

et al. 2004

J Agronomy Crop Science

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The effects of deep placement (supplied at 20 cm depth from soil surface below plants) of 100 kg N ha−1 of N fertilizers, urea, coated urea or calcium cyanamide (lime nitrogen) on the growth, nitrogen fixation activity, nitrogen absorption rate and seed yield of soybean (Glycine max L. Merr.) plants were examined by comparing them with control plots without deep placement of N fertilizer in sandy dune field. In addition, three different inoculation methods of bradyrhizobia were used for each N treatment: (1) transplantation of 10‐day‐old seedling in a paper pot with vermiculite inoculated with Bradyrhizobium japonicum USDA110, (2) direct transplantation of inoculated 10‐day‐old seedlings, and (3) transplantation of 10‐day‐old seedlings in a non‐inoculated paper pot. The deep placement of N fertilizers, especially calcium cyanamide and coated urea, markedly increased the growth and total N accumulation in shoot, roots and nodules, which resulted in an increase in seed yield. Daily N2 fixation activity and N absorption rate were estimated by relative abundance of ureide‐N analysed from the concentration of N constituents (ureide‐N, amide‐N and nitrate‐N) in root bleeding xylem sap and increase in total N accumulation in whole plants at R1, R3, R5 and R7 stages. The total amount of N2 fixation was about 50 % higher in the plants with calcium cyanamide and coated urea deep placements compared with control plants. Deep placement of slow release fertilizers kept nodule dry weight higher in the maturing stage of seed, possibly through abundant supply of photoassimilate to the nodules by supporting leaf area and activity until late reproductive stages. The results indicate that deep placement of calcium cyanamide or coated urea enhances N2 fixation activity, which ultimately increases the seed yield. The promotive effect was observed with the seedlings transplanted in paper pot with inoculum of bradyrhizobia within any treatments, although nodulation by indigenous rhizobia was observed in the plants transplanted with non‐inoculated paper pot.

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“…The stimulatory effects of deep placement of CU‐100 on growth, N 2 fixation and seed yield in rotated paddy field was first published by Takahashi et al. (1991b, 1992).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Dry Weight Of Shoot Root and Nodules And The Respective N Cmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Tewari¹,

Suganuma²,

Fujikake³

et al. 2004

J Agronomy Crop Science

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“…Many field data showed that the total amount of N assimilated in a plant shoot is highly correlated with the soybean seed yield. In Figure 4, the relationship between total amount of N in soybean shoot at R7 stage and seed yield is shown in a rotated paddy field in Niigata [17][18][19][20][21]. A linear correlation (r = 0.855) between seed yield and the amount of nitrogen accumulation in the shoot was observed.…”

Section: Biotic and Abiotic Constraints To Reduce Soybean Growth And mentioning

confidence: 99%

Role of Nitrogen on Growth and Seed Yield of Soybean and a New Fertilization Technique to Promote Nitrogen Fixation and Seed Yield

Ohyama¹,

Tewari²,

Ishikawa³

et al. 2017

Soybean - The Basis of Yield, Biomass and Productivity

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Soybean is an important crop for human food and feed for livestock. World soybean production is increasing especially in North and South America. Soybean seeds contain a high percentage of protein about 35-40%, and they require a large amount of nitrogen compared with other crops. Soybean plants make root nodules with rhizobia, and rhizobia can fix atmospheric N 2 and give the fixed N to the host soybean plants. Also, soybean can absorb nitrogen usually nitrate from soil or fertilizers. The amount of total assimilated nitrogen in shoot is proportional to the soybean seed yield either from nitrogen fixation or from nitrogen absorption, and the nitrogen availability is very important for soybean cultivation. Maintenance of a high and long-term nitrogen fixation activity is very important for a high production of soybean. However, application of chemical nitrogen fertilizers usually depresses nodule formation and nitrogen fixation. Nitrate in direct contact with a nodulated part of roots causes severe inhibition of nodule growth and nitrogen fixation, although a distant part of nodules from nitrate application gives no or little effect. Deep placement of slow-release nitrogen fertilizers, coated urea, or lime nitrogen promoted the growth and seed yield and quality of soybean without depressing nitrogen fixation.

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“…Since the roots in the deep layers might absorb the N released from deep placement of CU-100 and lime nitrogen, the inhibitory effect on N, fixation of the nodules in the upper layers may be attenuated. In the former experiment, top dressing of CU-70 at the initial flowering (Rl) stage inhibited N, fixation, indicating that deep placement is effective for separating nodulation sites near the surface from N absorption sites in deeper layers (Takahashi et al 1991b(Takahashi et al , 1992.…”

Section: Discussionmentioning

confidence: 99%

¹⁵N Analysis of the Promotive Effect of Deep Placement of Slow-Release N Fertilizers on Growth and Seed Yield of Soybean

Tewari

Onda

Ito

et al. 2005

Soil Science and Plant Nutrition

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It is well known that nodulation and nitrogen fixation of soybean are generally depressed by the application of N fertilizers. We previously reported that a new fertilization method consisting of deep placement of slow‐release N fertilizers, such as coated urea and lime nitrogen (calcium cyanamide) at a 20 cm depth enhanced soybean growth and seed yield. In the present study, the effect of deep placement of various 15N‐labeled N fertilizers (100 kg N ha−1) was compared in converted paddy fields located at Niigata Agricultural Research Institute, in Nagaoka. Fertilizers consisting of 15N‐labeled ammonium sulfate (AS), urea (U), coated urea (CU) or lime nitrogen (LN) were applied at a 20 cm depth for nodulated soybean (cv. Enrei) and for a non‐nodulated isogenic line (En1282). The plants without deep placement of N fertilizer were used as control (Cont) for both Enrei and En1282. Whole plants were sampled at maturing stage, and 15N abundance and N concentration in each part were determined. The evaluation of the amounts of Ndfa, Ndfs and Ndff was conducted by the 15N dilution method using En1282 as a reference plant. Also the amounts of Ndfa and Ndfs+Ndff were estimated by the N balance method for comparing Cont and the other treatments. In all the deep placement treatments, the non‐nodulated line exhibited only 36–40% of total dry weight and 16‐30% of total N accumulation compared with the nodulated line, due to N deficiency associated with the lack of nitrogen fixation. In both nodulated and non‐nodulated soybeans, plant growth and the total amount of accumulated N showed the highest values by the application of LN, followed by CU, U, AS and Cont, respectively. The value of the seed dry weight of Enrei was highest in the LN (73 g plant−1), followed by CU (63 g plant−1), U (47 g plant−1), AS (37 g plant−1) and Cont (26 g plant−1) treatments. The value of Ndfa estimated by the 15N dilution method was higher in the LN (3.6 g N plant−1) and CU (2.8 g N plant−1) treatments than in the U (2.3 g N plant−1) and AS (2.2 g N plant−1) treatments. In addition, the value of Ndfa estimated by the N‐balance method was also higher in the LN (4.1 g N plant−1), CU (3.9 g N plant−1), U (2.8 g N plant−1) and AS (2.6 g N plant−1) treatments than in the Cont treatment (1.5 g N plant−1). The recovery rate of N fertilizers in Enrei was higher in the LN (43%) and CU (36%) treatments than in the U (21%) treatment and lowest in the AS (8.5%) treatment. These results indicate that deep placement of LN and CU is effective to improve soybean growth and seed yield. The combination of “deep placement” and “slow‐release N fertilizers” is important to supply N until the maturation stage, resulting in the increase of seed yield.

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Effect of placement of coated urea fertilizer on root growth and rubidium uptake activity in soybean plant

Cited by 21 publications

References 6 publications

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Role of Nitrogen on Growth and Seed Yield of Soybean and a New Fertilization Technique to Promote Nitrogen Fixation and Seed Yield

¹⁵N Analysis of the Promotive Effect of Deep Placement of Slow-Release N Fertilizers on Growth and Seed Yield of Soybean

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Effect of placement of coated urea fertilizer on root growth and rubidium uptake activity in soybean plant

Cited by 21 publications

References 6 publications

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N2 Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N2 Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Role of Nitrogen on Growth and Seed Yield of Soybean and a New Fertilization Technique to Promote Nitrogen Fixation and Seed Yield

15N Analysis of the Promotive Effect of Deep Placement of Slow-Release N Fertilizers on Growth and Seed Yield of Soybean

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Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

Effect of Deep Placement of N Fertilizers and Different Inoculation Methods of Bradyrhizobia on Growth, N₂ Fixation Activity and N Absorption Rate of Field‐grown Soybean Plants

¹⁵N Analysis of the Promotive Effect of Deep Placement of Slow-Release N Fertilizers on Growth and Seed Yield of Soybean