Fundamental research on multiple-cutting technique for soybean in the southwestern warm region. -Cutting height and number of cutting-

2023 Fiscal Year Final Research Report

• Project/Area Number: 19K06000
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39020:Crop production science-related
• Research Institution: University of Miyazaki
• Principal Investigator: Ishigaki Genki 宮崎大学, 農学部, 准教授 (80584573)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Keywords: 飼料用ダイズ / 暖地型イネ科牧草 / 混播体系 / 再生性 / 播種方法 / 播種密度 / ローズグラス

Outline of Final Research Achievements

The goal of this study is to establish a soybean as forage production system using large machinery. As first approach, the regeneration ability of several soybean varieties was investigated under intercropping conditions with Rhodes grass which is one of tropical grasses. As second approach, the soybean sowing methods and sowing densities was examined. As a result, no difference was observed among soybean varieties in terms of regeneration ability after cutting, and the development of axillary buds was observed in about half of the soybean plants. However, the axillary buds did not grow and died due to dry conditions and severe insect damage during the growing period. Regarding the sowing method and sowing density, it is possible to sow using a working machine (such as a broadcaster) commonly used in feed production. Also, it is possible to adjust the proportion of soybean to the total yield by adjusting the amount of soybean sowing.

Free Research Field

飼料作物生産

Academic Significance and Societal Importance of the Research Achievements

本研究では、ダイズ植物体における再生性について、粗飼料利用の観点から評価し、持続的なタンパク質源の生産の可能性について検証し、再生性を有するダイズ品種を選定するとともに、再生時の外的環境について問題提起することができた。また、一般的な農業機械での播種作業を可能とする播種方法・播種密度について検証し、その最適条件を明らかにした。
以上のことから、本研究成果は、国内の粗飼料自給生産の向上、ひいては、海外からの濃厚飼料の依存を軽減させる上で、有効な方法の１つであることを明らかにした。