水肥耦合对延长冷地型草坪绿期的效应研究  

Effect of water-fertilizer coupling on prolonging the green period of cold season turf

作　　者：刘晓静[1] 张德罡[1] 胡杨[2] 蒯佳林[1] 黄亮亮 周爱琴[1] 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃农业大学农学院,甘肃兰州730070 [3]兰州市园林局,甘肃兰州730000

出　　处：《草原与草坪》2011年第4期18-24,共7页Grassland and Turf

基　　金：甘肃省教育厅项目"西北地区冬季草坪延长绿期措施及机制研究"(032-05)资助

摘　　要：在兰州通过田间试验对不同水肥处理下,冷地型草地早熟禾(Poa pratensis)、多年生黑麦草(Lolium prenne)和紫羊茅(Festuca rubra)混播草坪枯黄期和返青期盖度进行观测,测定各处理下草坪绿期,并对草坪外观品质进行综合评价比较。结果显示灌水和施肥之间的耦合,以水分每周灌水20 mm处理与施N肥25 g/(m2.a)和12.5 g/(m2.a)+P2O57.5 g/(m2.a)的配合,耦合效应著显,对推迟草坪枯黄和提前返青的效果都很突出,可显著延长冷地型混播禾草草坪的绿期。每周灌水20 mm和施N肥25 g/(m2.a)耦合最佳,可推迟草坪枯黄22 d,提前返青15 d,使草坪绿期延长37 d。Based on the field experiment, the effect of water-fertilizer coupling on prolonging the green peri od of turf under different irrigation and fertilization treatments were studied by measuring the coverage, green period and quality of cold season turf in Lanzhou. The results indicated that the irrigation treatment W3 （20 mm per week）and fertilization treatment N2 （25 g N/m2 · a） or NP （12.5 gN/m2 · a ＋7.5 g P2O5/m2 · a）shown the best effect for postponing the withering date and forwarding the re-greening date among all treatments. The interaction effect of the coupling between W3 and N2 was the best, and the withering date was postponed for 22 days,there-greening date was forwarded for 15 days and the green period was prolonged for 37 days.

关 键 词：水肥耦合 冷地型草坪 盖度 绿期 草坪质量 

分 类 号：S688.4[农业科学—观赏园艺]