On The Technique Of Light Roof Greening

In recent years, people have paid more attention to the roof which was as the building`s fifth facade. In today’s society, the roof greening has become the first choice of the contradiction between the remission of building area and green area. Light roof greening planting cost is low, the maintenance is easy, it has become an important approach to promotion of roof greening. Light roof greening in the application process also have some problem such as the matrix loss, high transport costs, establishing long construction period and so on. This research through the cultivation experiment, carry out research on cultivation substrates and plant breeding technology, the main research results are as follows:In Guangzhou summer rainstorm frequently climatic conditions, the use of Callisia Spiderwort on multiple ratio of light roof greening thermoset matrix selection, in order to meet the needs of Commelinaceae, screening and other department of roof greening plant growth, and has a certain property, reduce the loss of runoff caused by matrix material. Through the comprehensive evaluation matrix, Callisia Spiderwort growth indexes, finally obtains the garden waste and perlite mixed binder ratio was 7:3 and the ratio of solid organic fertilizer is the best substrate ratio.At present, domestic research on roof greening substrate plate is still in its infancy, using the seed-matrix roof greening technology, on the one hand can reduce the roof greening project to reduce the manpower cost; on the other hand, compared with the traditional roof greening project site deployment matrix, the division propagation or vegetative propagation method of planting like grass stems, seed matrix board roof greening technology more convenient transport and storage. The use of vegetative propagation, stem leaf picked as soon as possible the planting, storage, and inconvenient transportation, and the seeds with a longer storage period, more convenient transportation, with the matrix plate plant, the more simple and easy to carry out roof greening engineering. This study was using of Lolium perenne L. cultivation experiment, testing the impact on the seed germination and plant growth in the ratio of media, screening the optimal ratio. Through a comprehensive analysis of seed germination rate, the growth index and chlorophyll content in leaf of comparison, results show that, garden waste and perlite ratio of matrix in 4:1 production is more suitable for the growth and reproduction of plant seed, is the best ratio.As a Guangzhou native plant Murdannia loriformis has broad application prospects in the field of green roof, but slower growth rate, the longer the turf forming time restricted the promotion of roof greening. In this study, by comparing the different division propagation and stem cutting propagation to observe the growth of Murdannia loriformis, compare the speed, current and break the yoke of grass planting turf forming time was slow. The experimental results show that, because of the higher growing speed,the plant height of 10 cm division propagation methods have significant advantages over other methods.Those research results to reduce light roof greening substrate rain erosion and shorten the planting time limit for a project are improved, light roof greening technology accumulation of wealth, for the promotion of light roof greening, to provide technical support.