頁籤選單縮合
題 名 | 不同氮肥用量對青刈玉米莖稈品質之影響 |
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作 者 | 王慶裕; 朱德民; 李成章; | 書刊名 | 中華民國雜草學會會刊 |
卷 期 | 14:1 1993.06[民82.06] |
頁 次 | 頁49-64 |
分類號 | 434.146 |
關鍵詞 | 氮肥; 莖稈; 青刈玉米; Nitrogen; Stalk; Forage maize; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以青刈玉米單交種臺南11號及臺農351號二品種為材料,分春、秋二作,施以不同氮肥用量( 100,200,300kg/ha ),以探討氮肥對青刈玉米產量,農藝性狀及莖稈品質之影響。 結果發現高氮肥可穩定地提高臺農351號品種二個期作的鮮草產量,而臺南11號則以春作對氮肥有較高的需求量。 在高氮肥下可提高臺農351號秋作開花期之LAI值,但不改變葉數。此外,雖然伴隨著株高及穗位高增加,但同時也增加支持根數目及莖稈直徑,有利於抗倒伏性。試驗結果顯示,高氮肥處理並不改變物理性倒伏因子,包括莖稈硬皮強度及厚度,以及化學性倒伏因子,包括莖稈內碳水化合物,粗纖維,含量僅在開花後21天之穗位節節間中之糖分含量有降低之現象,至於下位節間則不受影響。此外,亦發現TDN(總乾物營養消化率)不受氮肥影響。因此,青刈玉米在不改變其營養消化率之情況下,增施氮肥提高鮮草產量,並未增加倒伏因子,值得加以重視。 |
英文摘要 | The experiment was conducted to study the effects of different amounts of nitrogen fertilizer (100,200 and 300kg/ha) on stalk quality in forage maize. Both varieties of single cross hybrid, Yainan 11, and Tainung 351 were used as materials durig fall, 1988 and spring, 1989, respectively. The results indicated that high N application could in crease forage production of Tainung 351 for both crop seasons, but the N effect of Tainan 11 expressed more sensitive for spring than fall crop. Both the physical and chemical factors influencing lodging, in cluding stem rind strength, thickness, carbohydates, and crude fiber content within internodes, were not affected by high N treatment. The TDN (total digestable nutrient) percentage did not change either. Although the Tainung 351 increased both heights of plant and ear position by high N treatment, the increment of brace root number and stem diameter will compensate for the arising lodging probility. All the results suggested that high N application on forage maize could in crease stalk production without any increment of lodging-promoting factors. |
本系統中英文摘要資訊取自各篇刊載內容。