報告書番号

482028

タイトル（和文）

太陽光反射利用による高能率作物栽培法に関する研究（第２報）－葉菜類およびトマト栽培

タイトル（英文）

STUDIES ON THE APPLICATION OF REFLECTED SOLAR RADIATION FOR GREENHOUSE CROPS (2) -EFFECT OF REFLECTED SOLAR RADIATION ON GROWTH AND YIELD OF LEAF VEGETABLES AND TOMATO-

概要 （図表や脚注は「報告書全文」に掲載しております）

施設園芸への太陽光の積極的利用をはかるため，当所考案の太陽光反射利用温室の実用化試験を実施した。（１）反射光利用温室内の日射量は，冬期の月別平均値で屋外日射量の９３～１０２％であり，比較対照した一般温室（屋外日射量の６２～６３％）より高く，明らかな日射量増加効果が認められた。（２）反射光利用温室内のレタス，サラダナ等葉菜類の生育はすぐれ，収量は一般温室より１５～４６％増加し，糖度，ビタミンＣ含量などの品質が向上した。（３）反射光利用温室におけるトマトの生育，収量はすぐれ，その栽培法としては３段ないし４段摘心密植栽培法が適した。

概要 （英文）

TO INCREASE THE AMOUNT OF DOWNWARD SOLAR RADIATION IN A GREENHOUSE,THE USE OF A HIGHLY REFLECTING BOARDS COVERED WITH ALUMINUM EVAPORATED POLYESTER FILM WAS INVESTIGATED. THE EXPERIMENTAL HOUSE,20M LONG,4.7M WIDE,1.6M HIGH TO THE EAVES,AND 3.3M TO THE RIDGEWAS ORIENTED EAST-WEST. THE REFLECTING BOARDS WITH 50 SQUERE M WERE SET ON THE INSIDE NORTH WALL OF GREENHOUSE FACING THE CROP. 1.IN EXPERIMENT 1(LEAF VEGETABLES CULTURE, 79DEC. 80MAR.),SOLAR RADIATION OF REFLECTING BOARDS GREENHOUSE AND CONTROL GEENHOUSE(CONVENTIONAL GREENHOUSE)WERE 94 AND 62% OF OUTDOOR RADIATION RESPECTIVELY. IN EXPERIMENT 11(TOMATO CULTUER, 80NOV. 81MAR.),RADIATION UNDER REFLECTING BOARD WAS 93 102%AND THAT OF CONTROL PLACE(WITHOUT REFLECTING BOARD AREA)WAS 62 69%,OF OUTDOOR. 2.IN EXPERIMENT 1,THE YIELDS OF HEAD LETTUCE,LEAF LETTUCE,GARLAND CHRYSANTHEMUM AND PAKCHOI WERE 131%,146%,115% AND 121% RESPECTIVELYCOMPARED TO CONTROL. BUT NOT JAPANESE HONEWORT IN THE EXPERIMENT HOUSEWAS VERY LOW. 3.WE CONDUCTED TWO DIFFERENT TRAINING METHODS IN TOMATO CULTURE(EXP.11). THE YIELD IN REFLECTING BOARDS TREATED HOUSE INCREASED25% IN SINGLE STEM TRAINING METHOD(THE 4 CLUSTER CULTURE)AND 20% IN THE CULTURE BY THE TRAINING METHOD OF SHOOTS WITH CONTINUOUS PINCHING ANDTWISTING AS COMPARED TO CONTROL. NUMBER OF DAYS TO FRUIT MATURATION WERE SHORTENED IN REFLECTING BOARD GREENHOUSE.

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