| Since the nineteenth National Congress had put forward the strategy of rural revitalization,the construction of beautiful countryside has been paid more and more attention by the state,and has become an important grasp of the smooth implementation of the strategy of Rural Revitalization.According to the national standard of the guide to beautiful countryside construction,there are three main lines:ecological civilization,people-oriented and standardized input.This is the most important part of the beautiful countryside construction,and at the same time,it requires that the beautiful countryside can not be built as a standard city,while promoting the urbanization,it is different from the cities and towns,which is more ecological and livable than the cost.The development of rural space agriculture in beautiful rural areas reasonably butted the beautiful rural construction of rural revitalization,highlighting the three synchronization of production,life and ecology,and harmonizing the three life.The combination of beautiful countryside construction and beautiful rural building space agriculture plays a great role in compensating land resources and improving local ecology.As a new agricultural production mode,roof agriculture itself is still in the theoretical exploration stage worldwide,and lacks systematic research.In this paper,the function of the roof agricultural system is refined into three attributes of production,life and ecology.It is divided into different types according to the planting mode and irrigation mode.The Wang Xinsong community in Laoling city of Shandong and the roof farm of the zoning of the Chinese Academy of Agricultural Sciences are selected as the main research object,and the system analysis method and thermal comfort evaluation are used.The analysis and evaluation of the agricultural production,living and ecological functions of roofs are analyzed and evaluated respectively.The composition,proportion and future development direction of the functions in the system are preliminarily explored.It is found that the production,life and ecology of the beautiful rural roof agriculture have three attributes,although they depend on each other in the system,but there are specific differences in the degree of function and the scale of value.In the 5 and June 2016,the output is estimated,and the annual output of the North roof farm is about 2.92kg/m2,in the ideal situation.The income ratio of three attributes of production,ecology and life in the system are 19.95%,47.02%and 33.03%respectively.The indirect benefit is far greater than the direct output value of agricultural products.The ecological function income of the system is the highest and the living function is second.It is worth noting that the influence of the North roof on climate is very severe and there is a little extreme climate condition.The intervention will have greater consequences.In 2016,the climate was normal,but there was an extreme high temperature in summer in July,which resulted in the decrease of the production of agricultural products.The annual output of agricultural production was only 1.63kg/m2,and the ratio of the above three attributes was 14.30%,39.79%and 45.91%.Farm production is positively correlated,and ecological function is slightly lower than life function.It indirectly proves the rationality and necessity of roof agriculture in the construction of beautiful rural system.Through the study of the water-saving model of space agriculture in beautiful rural areas,the root water stress test was set up to construct a water-saving operation model with good effect.It was found that the effect of total root stress on photosynthesis efficiency was very obvious.It could lead to the rapid decrease of photosynthesis efficiency of crops,thus the yield of crops was reduced.There is no obvious difference between the net photosynthetic rate and the control treatment under half root stress,and the effect of half root stress on the photosynthesis efficiency of crops is not obvious.Therefore,the method of irrigation of the root zone can be used in the production,which can reach the goal of water saving without affecting the crop yield,which is for the beautiful countryside roof.The water-saving operation of agriculture has important theoretical guiding value.Through the analysis and study of the different cultivation conditions of three kinds of vegetables,spinach,lettuce and purslane,it was found that the cultivation conditions of the improved soil in the improved soil were obviously superior to the other two kinds of cultivation patterns in the fields of yield,chlorophyll content and soluble sugar content,which may have better advantages in the field of water conservation after the improved soil of the slag.And slag contains rich mineral elements,which is beneficial to the growth of crops.Slag is a partial alkaline substance.After adding the soil,it will increase the pH value of the soil properly,which is conducive to the precipitation of the original nutrients in the soil and absorbed by the crops.For the above reasons,slag improving soil is a good cultivation mode of roof agriculture. |
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