摘要
在过渡性气候地区的假俭草草坪,宜在最低气温为12℃时(11月中、下旬)叶施Fe,最佳施用浓度为:单施Fe为0.6L/m2,N+Fe为4g/m2 N + 0.6L/m2Fe。秋冬季叶施Fe、N+Fe可提高草体内抗寒指标性物质的含量,叶施0.6L/m2 Fe或4g/m2 N + 0.6L/m2 Fe,可使草坪草体内脯氨酸、可溶性糖类含量及过氧化氢酶的活性分别提高25%、310%、180%和41%、182%、160%。叶施N+Fe处理的效果比单独施Fe的效果更好,施后草坪枯黄期比对照组推迟6～8d,半致死温度降低3～4℃。
Various rates of complex fertilizer of urea and EDTA-Fe were applied on centipedegrass leaves in late autumn to evaluate the effects of N and Fe on cold resistance of centipedegrass. The results showed that treatments of Fe or N+Fe increased the contents of matter correlated with cold resistence. 0.6L/m2 Fe fertilizer increased the contents of proline, soluble carbohydrate and catalase by 25%, 310% and 180%, respectively; 0.4g/m2N + 0.6L/m2 Fe fertilizer increased the contents of proline, soluble carbohydrate and catalase by 41%, 182% and 160%, respectively and gave the best result for cold resistance of centipedegrass. Foliar spray of N+Fe prolonged the green period of centipedegrass and dropped the medial lethal temperature for 3～4℃.
出处
《亚热带植物科学》
2004年第1期12-15,共4页
Subtropical Plant Science
基金
四川省青年基金资助项目(02ZQ026-057)
关键词
假俭草
草坪
FE
N
秋冬季
抗寒性
centipedegrass
turf
Fe
N
late autumn
cold resistance
