土壌環境がサトウキビの生育に及ぼす影響 : II. 沖縄の異なる土壌における 1 次株出しおよび 2 次株出しサトウキビの生育評価(農学科)

村山, 盛一; 宮里, 清松; 野瀬, 昭博; Murayama, Seiichi; Miyazato, Kiyomatsu; Nose, Akihiro

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土壌環境がサトウキビの生育に及ぼす影響 : II. 沖縄の異なる土壌における 1 次株出しおよび 2 次株出しサトウキビの生育評価(農学科)

http://hdl.handle.net/20.500.12000/3932

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	KJ00000162229.pdf

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公開日

2008-02-14

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土壌環境がサトウキビの生育に及ぼす影響 : II. 沖縄の異なる土壌における 1 次株出しおよび 2 次株出しサトウキビの生育評価(農学科)

言語

作成者

村山, 盛一
宮里, 清松
野瀬, 昭博
Murayama, Seiichi
Miyazato, Kiyomatsu
Nose, Akihiro

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open access

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http://purl.org/coar/access_right/c_abf2

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異常渇水がサトウキビの生育と収量に及ぼす影響を明らかにするために, 夏植え収穫後の1次株出しおよび2次株出しサトウキビを対象に調査を実施し, 次のような結果を得た。1. 少雨年である1977&acd;'78年期の1次株出しの生育は, 6月の時点では3ほ場間にはほとんど差異はなかったが, 生育後期になると多くの形質で, 島尻マージ土壌の上原, 喜屋武原ではジャーガル土壌の長田原に比べて著しく劣り, 特に平方メートル当り原料茎重は前年の夏植えの約半分に低下した(図1,図2,図3,図5,表3)。2. 降雨量の多かった1978&acd;'79年期の2次株出しでは, 上原, 喜屋武原の生育もかなり良く, 長田原との間にはほとんど差はなくなった(図1,図2,図3,図5,表3)。平方メートル当り原料茎重も上原, 喜屋武原では1次株出しの2倍に達し, 長田原に近い収量が得られた(表3)。このことは島尻マージ土壌でも水分補給さえ十分に行なえば, 株出し不萌芽個体も減少して, 茎数も増え, ジャーガル土壌とほとんど遜色のない収量が得られることを示唆している。3. 上原, 喜屋武原の1次株出しは葉がシオレ現象をおこして枯れ上がりを促進し, 1茎青葉数, 葉面積指数の著しい減少をもたらした(図6,図7,表3)。4. 実測茎重と推定茎重(茎の中央付近の横断面積×茎長)の相関はいずれも1%水準で有意であった。茎の充実程度について検討すると, 上原, 喜屋武原における1次株出しの実測茎重は推定茎重よりも軽い茎がかなりあり, 長田原より茎の充実が劣っていた。しかし, 2次株出しでは3ほ場間に大差はなかった(以上図8,図9)。

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The authors carried out studies to evaluate the degree of damage and other effects of drought on the 1st and 2nd ratooning sugar cane cultivated in three experimental fields of different soil types. Following results were obtained : 1. Concerning the 1st ratooning sugar cane for 1977-'78 harvest year, a little rainfall year, the growth in the early growth stage was not different among the three fields. Concerning the yield component parameters studied, almost all the parameters in the late growth stage were better at Nagatabaru with Jargaru soil than at Uebaru and Kiyanbaru both with Shimajiri-marji soil. Especially, the stalk weight per square meter of the 1st ratooning crop at Uebaru and Kiyanbaru showed only a half value of the summer-planted crop which was planted in summer 1975 (Fig.1,Fig.2,Fig.3,Fig.5,Table 3). 2. Concerning the 2nd ratooning sugar cane for 1978-'79 harvest year, a large rainfall year, the growth at Uebaru and Kiyanbaru was good as well as Nagatabaru (Fig.1,Fig.2,Fig.3,Fig.5,Table 3). The stalk weight per square meter for the 2nd ratooning crop at Uebaru and Kiyanbaru showed twice as that of the 1st ratooning crop at each same field, and it was close to that of Nagatabaru (Table 3). From the above results it is considered that almost equal stalk yield could be obtained at Uebaru and Kiyanbaru as at Nagatabaru by applying satisfactory amount of water to the soil. 3. Because of the wilting and withering of leaves resulted from water shotage, low values in the number of fresh leaves per stalk and in leaf area index were observed in the 1st ratooning crop at Uebaru and Kiyanbaru (Fig.6,Fig.7). 4. The correlation coefficient between stalk weight and estimated stalk weight was significant at 1% level (Fig.8,Fig.9). Concerning the 1st ratooning crop, the repletion of stalk jouice was better at Nagatabaru than at Uebaru and Kiyanbaru (Fig.8). For the 2nd ratooning sugar cane, the difference in the repletion among the three fields, namely, Uebaru, Kiyanbaru and Nagatabaru, was not so large as in the 1st ratooning crop (Fig.9).

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紀要論文

出版者

言語

出版者

琉球大学農学部

言語

jpn

資源タイプ

departmental bulletin paper

資源タイプ識別子

http://purl.org/coar/resource_type/c_6501

出版タイプ

VoR

出版タイプResource

http://purl.org/coar/version/c_970fb48d4fbd8a85

識別子

http://hdl.handle.net/20.500.12000/3932

識別子タイプ

HDL

収録物識別子

収録物識別子タイプ

ISSN

収録物識別子

0370-4246

収録物識別子タイプ

NCID

収録物識別子

AN00250548

収録物名

言語

収録物名

琉球大学農学部学術報告

書誌情報

号 32, p. 1-9, 発行日 1985-12-02

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土壌環境がサトウキビの生育に及ぼす影響 : II. 沖縄の異なる土壌における 1 次株出しおよび 2 次株出しサトウキビの生育評価(農学科)

× 村山, 盛一

× 宮里, 清松

× 野瀬, 昭博

× Murayama, Seiichi

× Miyazato, Kiyomatsu

× Nose, Akihiro

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