摘要
通过施肥对草坪色素含量变化、株高、观赏叶含水量的影响分析,用以确定最佳的施肥配方,进而为城市草坪养护提供理论基础。笔者以城市园林环境下正常生长的5年生草坪为试材,设置N:P:K比例为2:1:2,PF1、PF2、PF3氮用量分别为17.47、20.96、24.47kg/hm2。1个对照不施用任何肥料,3次重复,测定其在6—10月间色素、株高、观赏叶含水量变化规律。结果表明PF2处理显著提高观赏叶内叶绿素a含量,PF3次之;各施肥处理均会增加叶绿素b含量,PF3增加最明显,PF2最差;PF1对降低类胡萝卜素含量效果最显著,PF2次之;PF3对促进草坪高度生长效果最佳,PF2次之;施肥对增加观赏叶内含水量具有较好的作用,但是由于草坪修剪的影响,不同月份处理间差异较大。综合分析认为,PF2处理对提高观赏价值效果最佳。
The study on the analysis by the effect of the change in pigment content,plant height,leaf water content under fertilization,which can provide a theoretical basis for the city lawn maintenance.Based on the 5 years old lawn to normal growth in urban landscape environment as the test materials,the author set N：P：K ratio of 2：1：2,and set the amount of nitrogen of PF1,PF2,PF3 respectively was 17.47,20.96,24.47 kg/hm 2.By using a control without any fertilizer,and 3 times repetition to get the measurment of the changes in pigment content,plant height,leaf water content between June to October.The results showed that PF2 treatment significantly increased the content of leaf chlorophyll a,and that of PF3 was second;every treatment would increase the content of chlorophyll b.The most obvious increase was in PF3,and PF2 was the worst;PF1 reduced carotenoid content with the most significant effect,PF2 was second;PF3 best promoted the growth of lawn height,PF2 was second;fertilization had a good effect for increasing the leaf water content.However,due to the impact of clip lawn,there were differences among the treatments in different months.With the generally analysis,PF2 treatments took the best effect on improving ornamental value.
出处
《中国农学通报》
CSCD
北大核心
2011年第22期296-300,共5页
Chinese Agricultural Science Bulletin
基金
大庆职业学院应用技术科研资金支持"大庆市连作草坪营养肥配方开发研究"(QY201012)
关键词
草坪
施肥
色素
株高
含水量
lawn
fertilization
pigment
plant height
water content
