CAJ | 학술논문

以‘津优4号’黄瓜为试验材料，研究施用不同作物秸秆对衰老过程中黄瓜根系活力和叶片氮代谢关键酶、叶片氮素含量及可溶性蛋白含量等影响。结果表明，与对照相比，作物秸秆还田不仅显著提高了黄瓜的根系活力、叶绿素含量和叶片氮代谢关键酶硝酸还原酶、谷氨酰胺合成酶、谷氨酸合成酶的活性，降低了谷氨酸脱氢酶活性，而且还降低了叶片铵态氮的含量（15．6μg·g－1），提高了叶片硝态氮、可溶性蛋白及游离氨基酸的含量，有效地保持较高的氮代谢水平，延缓了黄瓜的衰老。其中施用玉米秸秆效果最好，黄瓜的根系活力、硝酸还原酶活性、可溶性蛋白含量分别比对照提高了23．4％、33．3％、18．7％，其次为花生秸秆，硝酸还原酶活性比对照提高了10．8％，施用稻壳效果不明显。
이‘진우4호’황과위시험재료，연구시용불동작물갈간대쇠로과정중황과근계활력화협편담대사관건매、협편담소함량급가용성단백함량등영향。결과표명，여대조상비，작물갈간환전불부현저제고료황과적근계활력、협록소함량화협편담대사관건매초산환원매、곡안선알합성매、곡안산합성매적활성，강저료곡안산탈경매활성，이차환강저료협편안태담적함량（15．6μg·g－1），제고료협편초태담、가용성단백급유리안기산적함량，유효지보지교고적담대사수평，연완료황과적쇠로。기중시용옥미갈간효과최호，황과적근계활력、초산환원매활성、가용성단백함량분별비대조제고료23．4％、33．3％、18．7％，기차위화생갈간，초산환원매활성비대조제고료10．8％，시용도각효과불명현。
The study aims to investigate the effects of different crop straw on key enzymes of nitrogen metabolism of root system and leaves ,nitrogen content and soluble protein content in leaves of Jinyousihao during senescence .The re-sults showed that ,compared with the control ,crop straw significantly increased the root activity ,chlorophyll content ,ni-trate reductase ,glutamine synthetase and glutamate synthase activity ,while it reduced the glutamate dehydrogenase activ-ity and the content of ammonium nitrogen in leaves (15 .6μg·g-1 ) .The nitrate content ,soluble protein and free amino acid content increased ,which effectively maintained a higher level of nitrogen metabolism and delayed the senescence of cucumber .The effect of corn straw returning was the best ,for the root activity ,nitrate reductase activity and soluble pro-tein content the this treatment were increased by 23 .4% ,33 .3% and 18 .7% ,respectively ,as compared with the con-trol .Peanut straw showed better effect ,with nitrate reductase activity increased by 10 .8% .By contrast ,rice straw re-turning showed no significant effect .