Study On The Ecological Effects Of Intercropping Meteorological Citrus Orchard Grass

With the rapid development of citrus industry, China’s citrus planting area and total yield rank first in the world. Citrus is a subtropical fruit trees,its yield is closely related to meteorological factors. Florescence hot rainy, cryogenic freezing, fruit puberty of drought, and other weather disasters can lead to a great amount of reducing in citrus. This paper, taking Jiangxi Xingan County Hongguan village Citrus Park as the main research object, for grass cultivation experiment in Citrus Orchard, studies the effect of different grass species interplanting citrus groves on the ecological effects of weather, analysizes the main characteristics of microclimate under different grass intercropping and selects the suitable ecological citrus orchard planting grass for further analysis of effect of artificial planting on ecological. The main results are as follows:1. Different grass intercropping have an impact on the climate. Summer and autumn temperature, lower than that of the control at1.1℃and1.0℃, can reduce the temperature effect while the spring and winter air temperature, higher than that of the control 1.9℃and 1.5℃ has a warming effect. Grass intercropping can work on temperature adjustment.2. Different grass intercropping, for all the seasons, can affect relative humidity. The relative humidity is the highest in winter, and it is higher in spring than in summer, and lowest in autumn.Grass intercropping can increase relative humidity of a year, higher than the control 6.2%, 5.2%, 4.3% and 8.7% respectively.3. Different grow grass intercropping will influence the temperature of a year. Soil temperature shows that it is the highest in summer and the second in autumn, the third in spring the forth in winter, which is in accordance with the temperature. Spring, summer and autumn have different cooling effects and cool the temperature1.4℃,2.0℃and0.6℃ respectively. In winter grass can increase the temperature by 1.1 ℃.4. Different grass intercropping affects the seasonal soil water content. Soil water content is highest in spring(11.8%), and winter(10.3%) was higher than in autumn(8.5%) while it is the lowest in summer(5.9%). four seasonal soil moisture with regard to grass intercropping treatment is higher than CK, so citrus orchard grass can improve the soil moisture content.5. The different grass intercropping correlation processing of meteorological factors and yield analysis showed that,Significantly positive correlation with the soil temperature of each season in processing zone affects different grass intercropping system in citrus orchards of meteorological and ecological effect, and most grass treatment, air temperature, soil temperature, soil water content have a positive correlation with yield.6. All intercropping treatments on the regulation of temperature, soil temperature of citrus groves and the effect on yield, ocimum americannm grass treatment, can not only improve the citrus orchards of temperature and humidity effect, but also improve the citrus production. It is a large scale in local intercropping patterns.7. The application of gray relational analysis of different grass intercropping to evaluate comprehensively meteorological ecological effects, integrated sort is: Ocimum americannm > Centaurtea cyanns > Lolium perenne > Cichorium intybus > Ageratum conyzoides>CK,the best improvement in citrus orchard microclimate of intercropping is Ocimum americannm and it can be applied in production practice.