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No.31 (1984/11) >

Title :ジャイアント タイプ ギンネムの生産性に及ぼす施肥の効果 : 1 年目の成績(農学部附属農場)
Title alternative :The effect of fertilization on the productivity of giant-type Leucaena leucocephela (Agricultural Experiment Station)
Authors :古謝, 瑞幸
Authors alternative :Koja, Zuiko
Issue Date :19-Nov-1984
Abstract :ジャイアント タイプ ギンネム(K72a)の年間の刈取り回数と収量を調査した。ギンネムは1982年5月29日に播種し, 初年度は掃除刈りして, 2年目に調査した。草高は平均110cm, 刈取高は地上25cmとした。調査区は9m^2(3×3)を6区設定し, 処理区I, II及びIIIの3区で, 各処理当り2反復とした。1)年間の生草収量の全体平均は12.51kg, 総乾物量は2.92kgで, その歩留りは23.8%であった。乾物収量の68.2%は葉部であった。2)施肥の効果は生草収量だけにみられただけであった。3)ギンネム(K72a)の生草の平均DGは268gで, 第5回刈り(9月)の455gが最も高く, 第6回刈り(11月)と第1回刈り(5月)はそれぞれ約130gで平均以下であった。生草収量と乾物収量は9月が最も高く, 10月から3月にかけてはギンネムの生長は緩慢であった。
An investigation was conducted on the annual cutting times and the yields of giant-leucaena (K72a). Seeding was done on May 29,1982 and the investigation was carried out in the second year following the clean-cut of the plants of the first year. At an average stage of 110cm in height, they were cut at a height of 25cm above ground level. Six plots of 9m^2 (3×3) were arranged dividing into 3 treatments of I, II and III and each treatment was repeated twice. 1) The over-all mean of the annual green yields was 12.51kg containig 23.8% of dry matter of 2.92kg, and 68.2% of the dry matter consisited of leafy portion. 2) The effect of the fertilization was shown on the green yields only. 3) The annual over-all mean of DG (Daily gain) of the green yields was 268g contrary to 455g of the highst of the 5th cutting in September. The lowest yields among the six cutting times was 130g of the 6th in November and the 1st in May, which was significantly lesser than annual over-all mean. According to the results, the highst production of both of the green yields and the dry matter yields of the leucaena is considered to be performed in September, and lower to March.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3980
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.31 p.227 -231
Appears in Collections:No.31 (1984/11)

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