Establishment of low input and stable high-yield croping system of backwheat utilized abandoned cultivation area in Okinawa.

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450024
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crop production science
• Research Institution: University of the Ryukyus
• Principal Investigator: Kitou Makoto 琉球大学, 農学部, 教授 (50252797)
• Co-Investigator(Renkei-kenkyūsha): NAITHO Shigeyuki 琉球大学, 農学部, 教授 (30333397) ; HARA Takahiro 九州沖縄農研センター, 主任研究員 (40355657) ; SUZUKU Taturo 九州沖縄農研センター, 主任研究員 (00469842)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ソバ / 緑肥 / ラッカセイ / 耕作放棄地 / 鉄型リン / アルミニウム型リン / 不耕起栽培 / 酸性土壌

Outline of Final Research Achievements

Backwheat cultivation has been strated in the northern part of Okinawa Island. Red soil distributed In these area, was acid soil and low phosphorus fertility in order to fertilized phosphate were fixed to iron type phosphorus. Cultivation of green manure legume and ground nut as an intercropping for buckwheat capable of improvement of phosphorus fertility and possibility of high yield cultivation of buckwheat were investigated.
Crotalaria brevidens and C. pallid were higher efficiency as a green manure than commercially C. juncea and C. spectabillis. Both buckwheat and green manure were grown in notillage cultivation, and this effect increased over the years. Since ground nut can absorb iron type phosphorus, the yield of buckwheat has increased due to the application of harvest residue ground nut.

Free Research Field

作物栄養学