Study On The Measure Of Boring In The Rhizospheric Soils To Aerate For Meliorating The Weak Growth Potential Of The Urban Tree

As the city developing, the growth potential of street trees is turning weaking. There are three majorreasons: underground soil qualification, environment condition on the ground and artificialinfluence. The first factor is the basic reason that influences the street trees to grow,because of the tightly solid, high temperature, badly ventilating, low water content, thelacking nutrient, and the severe pollution of the urban soil. In order to improve the breath, thewater content and the nutrient in the soil, we study on the measures of boring in the rhizospher to aerateand supplement nourishment for remedying the greenery. This thesis evaluates that measure anddiscusses the diversifications of the CO₂ and O₂ concentration in the soil. The outcomes of the studyas follows:1. The measures of boring in the rhizospher to aerate and supplement nourishment strengthened theplant root to breathe and absorb water, reinforced the necessary nutrient for trees growing, and madethe street tree develop up snuff, which the laminas increased thicker the new tips developed vigorously.The bored hole conduced the new root bourgeoning and vegetating. The color of the leaves weredeepen, the water content of the leaves was relatively high, and the disease spots resumed soon afterboring the soil where the plant living.2. The nourishment supplemented by the boring measure not only ameliorated the rate breath, but alsofurnish the nutrition for the rootage and strengthen the lamina photo-synthesis. Compared with the treeswhose rhizospheric was bored but no nourished, the leaf thickness of the plant by that measureincreased more, so higher their water content of the lamina. The nourishing measure hadenergetic effects on the greenery to increase the biomass, strengthen the resistance todisease and improve the growing condition.3. The CO₂ and O₂ densities in the curst cover soil had certain negative relativity, but theirrelated coefficient couldn't be given with the assurance, needing a further study.4. Additionally jamming, this measure also has some shortage, so were to perfectachievement, the high-tech construction and management should be applied.