Obihiro University of Agriculture and Veterinary Medicine

• 農耕地土壌におけるリン酸の蓄積抑制と利用率向上に関する研究
• バレイショやタマネギ栽培におけるカルシウム施肥が生育や品質に及ぼす影響に関する研究
• 家畜ふん尿を原料とする堆肥やスラリーの有効利用に関する研究
• アフリカ南東部に分布する熱帯赤色土壌における耕畜連携と作物生産性の向上
• 土壌診断や土壌断面調査に基づく土壌改良および施肥技術に関する研究
• 土壌特性や土壌水分の空間的変動に関する研究

土壌には未知なる機能がたくさん残っており、畑や草地で作物生産を行う上で、これまでに着目してこなかった成分、つまり窒素やリン酸といった肥料成分ではない“なにか”が実は大切ではないかと考えています。地球の食料と環境を支えるのはバイテクやクローンだけではなく、そんな機能の解明かもしれません。“科学的な持続型農業”を目指して、地域の生産者や学内外のいろいろな人達と新しい研究を展開しています。体力と気力があって、おいしい農作物を食べたい人、一緒に土壌の謎解きを楽しんでみませんか。

The main theme of my research is to draw out the power of the soil that support sustainable food production. I have been tackling various researches till now to achieve sustainable production and supply of high-quality and safe foods by bringing out the best in soils and abilities of plants into full play. In recent years, I have carried out researches on 1) evaluation and effective utilization of phosphate and other plant nutrients in arable soils, 2) effects of fertilization techniques on the growth and quality of potato and onion (photo 1), and 3) function of dissolved humic substances in the manure compost and digested slurry, especially on plant physiological activities and nutrition uptake. I am also working on international researches in African and Asian countries 1) evaluation and improvement on soil fertility in crop production area of Kenya and Malawi by crop-livestock integrated agriculture (photo 2), and 2) influence of traditional slash and burn agriculture on carbon accumulation and spatial variation of soil fertility in Malaysia (photo 3).

So far, soil science has advanced mainly towards improving food production technology in accordance with natural scientific aspects. On the other hand, sophisticated societies have become distant from agriculture and soil, and it seems that they are losing sight of the essence of agriculture and soil. In order to preserve symbiosis between nature and human society, it is indispensable not to confront people and the environment, but to think from the viewpoint that they are united together, to explore the relationship between people and the environment from a multifaceted perspective. In harmony of sustainable nature and society, I try to aim at research that can train people capable of widely disseminating that we cannot live away from the soil.

• Fertilization technique and soil improvement for processing potato cultivation in Hokkaido
• Evaluation and improvement on soil fertility in potato production area of Kenya
• Influence of traditional slash and burn agriculture on carbon accumulation and soil fertility in Sabah, Malaysia
• Interactive effects of nitrogen and magnesium nutrition on yield and quality of potato
• Evaluation of soil fertility and water-holding ability by remote sensing and spatial variation analysis
• Possible reduction of phosphate fertilization by compost and fertilizer mixed pellet
• Accumulation and dissipation of elements by comparing vertical distribution in virgin and arable Andisols
• Effect of soil disturbance on spatial variation of soil properties and crop production in Chinese yam field
• Effective utilization of high phosphorous steel slag as phosphate fertilizer