关键词: 屋顶绿化, 屋顶绿化, 色彩搭配, 景天科植物

Abstract:

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/hm2. 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.