報告書番号

U91033

タイトル（和文）

野菜工場の実用化（２）エダマメの水耕栽培条件

タイトル（英文）

DEVELOPMENT OF VEGETABLE FACTORY FOR COMMERICIAL USE (2) HYDROPONIC CULTURE OF GREEN SOYBEAN

概要 （図表や脚注は「報告書全文」に掲載しております）

野菜工場の収益性を高めるために，冬期に価格が高いエダマメを栽培作物として選定して栽培試験を行い，栽培条件についての知見を得た。（１）品種の選別栽培試験に用いた１４品種のうち，「狩勝３号」，「しろふさ」，「ふくら」，「白獅子」，「つゆたま」，「サッポロミドリ」の６品種が水耕栽培に適していた。（２）栽培条件栽培に適した栽植密度は，１平方ｍ当たり約３０株である。日長時間は，１２～１４時間が適切である。培養液の濃度は定植から開花期まで標準の園試処方の１／４濃度に，開花後を１／２濃度に調整するのが適切でった。培養液のＰＨは，５．５～６．５が適当であった。（３）増収方策根粒菌を人工接種すると，収量が約９～１７％増加した。水耕方式は，流液式（ＮＦＴ）が，湛液式に比較して，生育が早く，多収量であった。（４）収量収量は，冬期栽培で約１４００～３２００ｇ平方ｍの範囲であり，平均で約１８００ｇ／平

概要 （英文）

A VEGATABLE FACTORY,WHERE NATURAL AND ARTIFICIAL SOURCES OF LIGHT ARE USED FOR AIR CONDITIONING IN THE CULTIVATING ROOM,HAS BEEN DEVELOPED BY CRIEPI TO ACHIVE SUCCESSIVE PRODUCTION OF SPINACH AND LETTUCE. IT IS,HOWEVER,NECESSARY TO INCREASE THE PROFIT OF THE VEGETABLE FACTORY FOR COMMERCIAL USE. GREEN SOYBEAN WAS CHOSEN AS ONEOF THE CROPS CULTIVATED IN THE VEGETABLE FACTORY BECAUSE OF ITS HIGHERPRICE IN WINTER THAN THE VEGETABLES MENTIONED ABOVE. THE STUDY WAS CONDUCTED TO ESTABLISH THE CULTIVATION TECHNIQUES FOR GREEN SOYBEAM BY HYDROPONIC CULTURE IN THE VEGETABLE FACTORY. THE RESULTS ARE AS FOLLOWS: (1)THE KARIKACHI NO.3,SHIROFUSA, FUKURA, SHIROJISHI,TUYUTAMA AND SAPPOROMIDORI CULTIVARS ARE SUITABLE FOR CULTIVATION BY HYDROPONIC CULTURE BECAUSE THEY SHOW BETTER GROWTH AND LESS DAMAGE DUE TO MINERAL DEFICIENCY OR EXCESS IN THE HYDROPONIC SOLUTION COMPARED TO OTHER CULTIVARS. (2)THE BEST PLANTING DENSITY IS ABOUT 30 PLANTS/SQUARE M TO RESTRAIN SHOOT OVERGROWTH AND TO RIPEN THE PODS WELL. THE YIELD INCREASES WITH INCREASING DAY LENGTH. THE SHOOTS,HOWEVER,OVERGROW AT A DAY LENGTH OF 16 HOURS.THE LIGHTNING PERIOD,THEREFORE,SHOULD BE LESS THAN 14 HOURS,AND ABOUT 12 HOURS IS BEST. THE CONCENTRATION OF THE NUTRIENT SOLUTION IS VARIABLE BUT SHOULD BE MAINTAINED AT AN ELECTRIC CONDUCTIVITY (EC)VALUE OF 0.6MS/CM FROM THE GROWING STAGE TO CONTROL THE SHOOT GROWTH AND RIPEN PODSWELL. (3)INOCULATING ROOT-NODULE BACTERIA INTO THE ROOTS INCREASED THEYIELD BY 9% TO 17% MORE THAN THE YIELD WITHOUT BACTERIA. (4)THE YIELDSWERE FROM 1400 TO 3200 G/SQUARE M AND THE AVERAGE WAS ABOUT 1800 G/SQUARE M IN WINTER.

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