報告書番号

485004

タイトル（和文）

空気イオンの作物生育に及ぼす影響（第３報）土耕および養液栽培による影響の相違と培養液中のイオン吸収についての検討

タイトル（英文）

EFFECTS OF AIR IONS ON CROP GROWTH -(3)EFFECTS ON YIELDS OF RADISH CULTIVATED BY SOIL OR NUTRIENT CULTURE, AND ION UPTAKE OF RADISH FROM NUTRIENT SOLUTIONS-

概要 （図表や脚注は「報告書全文」に掲載しております）

種々の試験機関による屋外の空気イオン接触栽培試験との関係を明らかにする目的で，施設内で負の空気イオン高密度環境条件を作出し，土耕および養液栽培のハツカダイコンに対して連続接触を行った。その結果，生育収量に及ぼす空気イオンの影響は，土耕栽培，水耕栽培のいずれの場合にも明らかでなく，また，土耕栽培と水耕栽培に対する空気イオンの影響の相違も明らかでなかった。前報からのさまざまな条件下で繰返し行った１１回の栽培試験結果に対し，負の空気イオンの影響の発現の特徴および限界を検討したところ，明らかに影響は認められなかった。ハツカダイコンによる培養液中のカリウム，硝酸，塩素イオンの吸収に及ぼす負の空気イオンの影響を検討するため，前報より詳細に実験を行ったが，培養液中イオンの明らかな選択吸収は認められなかった。

概要 （英文）

CULTIVATION EXPERIMENT OF CROPS HAVE BEEN CONDUCTED IN FIELDS UNDER THE CONDITIONS OF HIGH DENSITY OF AIR IONS AT SEVERAL ORGANIZATIONS. MEANWHILE THE EFFECTS OF AIR IONS ON GROWTH OF RADISH HAD BEEN INVESTIGATED IN SOLUTION CULTURE IN GREENHOUSE REPEATEDLYAND THE RESULTS WERE REPORTED AT PREVIOUS PAPER. THE OBJECT OF THIS STUDY WAS TO CLARIFY THE DIFFERENCES OF EFFECTS OF AIR IONS ON CROPS BETWEEN IN FIELDS AND IN GREENHOUSE. RADISH PLANTS WERE GROWN IN CABINETS IN GREENHOUSE WHICH WERE ABLE TO EXPOSE TO HIGH DENSITY OF AIR IONS BY SOIL OR SOLUTION CULTURE. EXPERIMENTS WERE CONDUCTED TWICE IN SOIL CULTURE, AND TWICE IN SOLUTION CULTURE IN HIGH DENSITY OF NEGATIVE AIR IONS(ION CURRENT PER PLANT:1.04-4.80NA/PLANT). GROWTH OF RADISH SHOWED NO APPARENT DIFFERECES BETWEEN SOIL AND SOLUTION CULTURE IN DRY AND FRESH WEIGHT. FURTHER DRY WEIGHT RATIOS OF THE TREATMENT TO THE CONTROL WERE CONSIDERED IN ALL OF THESE EXPERIMENTAL RESULTS IN PREVIOUS AND THIS PAPER. HOWEVER THE RATIOS SHOWED NO APPARENT DIFFERENCES FROM THE RATIOS EQUAL TO ONE IN THE WEIGHT OF SHOOT, ROOT AND TOTAL, AND SHOOT/ROOT RATIO. FOR THE PURPOSE OF EXAMINING THE EFFECTS OF NEGATIVE AIR IONS ON UPTAKE OF K, NO3 AND C1 IONS IN NUTRIENT SOLUTION BY CROPS IN MORE DETAIL THAN IN PREVIOUS PAPER,RADISH PLANTS WERE CULTIVATED BY NUTRIENT SOLUTION IN SMALL POTS AND WERE EXPOSED TO AIR IONS IN GREENHOUSE CONTINUOUSLY. HIGH DENSITY OF NEGATIVE AIR IONS(IONCURRENT PER PLANT: 1.72-4.80 NA/PLANT)DID NOT INDUCE AN APPARENT DIFFERENCE IN THE RATE OF K, NO3 AND C1 IONS UPTAKE FROM NUTRIENT SOLUTION.

報告者

キーワード