Application of P-efficient legumes for utilization of less labile P in dry tropical cropland, Tanzania

• Project/Area Number: 25850040
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plant nutrition/Soil science
• Research Institution: Tokyo University of Agriculture and Technology (2015); Kyushu University (2013-2014)
• Principal Investigator: Sugihara Soh 東京農工大学, (連合)農学研究科(研究院), 准教授 (30594238)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: リン / 難溶性リン / シロバナルーピン / 半乾燥熱帯アフリカ / 土壌肥沃度

Outline of Final Research Achievements

Phosphorus (P) deficiency is one of the largest constraints to crop production in tropical Africa, so, it is necessary to better exploit soil P resources through increasing labile soil P using P-efficient plants. The aim of this study was to evaluate the effect of various P-efficient legumes (especially for white Lupin; Lupinus albus L.) on fractionated rhizosphere soil P in two contrasting textured soils of Tanzania. We conducted a 30-day pot experiment, where white lupin (WL), cowpea (Vignaungui culate L.; CP) and pigeon pea (Cajanus cajan L.: PP) were grown. We observed clear effects of all legumes on the rhizosphere soil P dynamics of all fractions in both soils, except for the labile P fraction in clayey soil. The effect of legume growth on the less labile inorganic P fraction (NaOH-Pi) was different between legumes; WL decreased the NaOH-Pi, while CP and PP increased it. Our results suggest that WL had different P mobilization characteristics from CP and PP.

Research Products

• [Int'l Joint Research] Sokoine University of Agriculture(Tanzania)
• [Journal Article] Effects of different phosphorus-efficient legumes and soil texture on fractionated rhizosphere soil phosphorus of strongly weathered soils. (2016)
  • Author(s): Sugihara, S., Tomita, Y., Funakawa, S.
  • Journal Title: Biology and Fertility of Soils Volume: 52 Issue: 3 Pages: 367-376
  • DOI: 10.1007/s00374-015-1082-4
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Surface runoff generation and soil loss under different soil and rainfall properties in the Uluguru mountains, Tanzania. (2016)
  • Author(s): Nishigaki, T., Sugihara, S., Kilasara, M., Funakawa, S.
  • Journal Title: Land Degradation and Development Volume: In press
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Evaluation and improvement of soil carbon, nitrogen and phosphorus dynamics in Tanzania. (2015)
  • Author(s): Sugihara, S., Funakawa, S., Nishigaki, T., Kilasara, M., Kosaki, T.
  • Organizer: 28th Soil Science Society of East Africa.
  • Place of Presentation: Morogoro, Tanzania
  • Year and Date: 2015-11-23
  • Int'l Joint Research / Invited
• [Presentation] Different P uptake characteristics of three legumes in two contrasting soil texture croplands of Tanzania. (2015)
  • Author(s): Sugihara, S., Tomita, Y., Nishigaki, T., Kilasara, M., Wasaki, J., Funakawa, S.
  • Organizer: 12th International Conference of ESAFS
  • Place of Presentation: Nanjing, China
  • Year and Date: 2015-09-18
  • Int'l Joint Research
• [Presentation] 熱帯強風化土壌においてマメ科作物が根圏土壌のリンの存在形態に与える影響の解明～White lupin, Cowpea, Pigeon peaの比較から～ (2015)
  • Author(s): 杉原創，富田祐太郎，西垣智弘，Method Kilasara，和崎淳，舟川晋也
  • Organizer: 日本土壌肥料学会
  • Place of Presentation: 京都府京都市
  • Year and Date: 2015-09-09
• [Remarks] 杉原創のHP
  • URL: https://sites.google.com/site/sugihara0901/
• [Remarks] 杉原創の研究ブログ
  • URL: http://blog2013sugihara.japanprize.jp/
• [Remarks] 杉原創のHP
  • URL: https://sites.google.com/site/sugihara0901/
• [Remarks] 杉原創の研究ブログ
  • URL: http://blog2013sugihara.japanprize.jp/2014/03/blog-post.html