The Influence Of Different Water Treatments Of The Seed-base Breeding Seedling And The Nutritive Bowl Breeding Seedling Upon Different Water Treatments

Due to the influence of human activity, the extent of damage and speed of thenatural environment is unceasing increasing, which caused a series of ecological andenvironmental problems, species diversity, ecosystem degradation, forest declined,desertification, environment pollution, soil erosion, Human beings rely on the survivaland development of the natural basis received great threats and damage. Vegetationrestoration goal is to build a stable health of vegetation communities, so as to achieverecovery of ecological environment, improve the environment effect, therefore the inthe work of woodlands return, make the recovery of forest has the similar structureand function of ecological system stability to natural forest is the most important. Butevaluating the health of the vegetation and the ecological functioning of degree, youcan’t just look at the surface coverage, the structure of the forest land is moreimportant, especially the structure of the under root system. the root is the mostimportant plant absorbing moisture and nutrients nutrition organs, the form anddistribution directly reflects the plant body health, play a crucial role on plant growth,and affect plant protection ability to drought stress.This study closely combining the vegetation restoration technology need, choosethe north of vegetation restoration work common tree species-arborvitae as theresearch object, explore the nutritive bowl breeding seedling, the seed-base breedingseedling in sufficient moisture, mild water stress, severe water stress condition rootmorphology and configuration changes and the cause of the difference of the produceand collect the root system configuration characteristic and growth information, set upthe arborvitae tree species root system configuration, decide strong stable theformation mechanism of root system. Through the observation of the plate with thenutritive bowl breeding seedling and the seed-base breeding seedling in three differentmoisture conditions of biomass index, And the determinate, analyzes the difference ofthe root morphology and configuration, get the following main conclusion 1. In adequate moisture conditions, the nutritive bowl breeding seedling and theseed-base breeding seedling can promote root length, root surface area, lateral rootlength, the most coarse plant height, ground diameter, root biomass, root-shoot ratio,and other aspects of the growth; And furthermore the nutritive bowl breeding seedlingpromote the lateral root number, root level number, number of bifurcation growth.2. Light water stress, the seed-base breeding seedling growth is influenced lessdegree, and furthermore seedlings growth is inhibited in certain degree, but mildstress promote the nutritive bowl breeding seedling the growth of main root lengthand root biomass to a certain extent, furthermore, inhibit the growth of the lateral root,cause lateral root number, root tips number, the number of forks decrease.3. In severe water stress, the seed-base breeding seedling growth is influenced bycertain degree suppressed, and furthermore the nutritive bowl breeding seedling isinfluenced more big degree, the plate on the ground and underground seedling indexof the seed-base breeding seedling all shows significant advantages, because theseed-base breeding seedling root system configuration is approaching to naturalrobust form, and furthermore the nutritive bowl breeding seedling growth is limit byits structure in early growth, lot of root winding In the bottom of the nutritive bowl，and cause the seedling root is not obvious. With water stress gradually, the advantageof seed-base breeding seedling promote the ground biomass growth, but the nutritivebowl breeding seedling is opposite.4. The research results provides we with important reference on developing highquality seedling, building a stable of vegetation communities; At the same time, butalso providing good theoretical basis for future set up the scientific vegetationrestoration technology system, so as to guide the natural vegetation protection andartificial vegetation construction.