Construction Technology Of Artificial Population Of Ammopiptanthus Mongolicus

Ammopiptanthus mongolicus, is a leguminous plant of Papilionaceae. It is anancient relic species of the Tertiary Period. Our country had listed it into first-classprotective plants, which is valuable, rare and in imminent danger, also is the evergreenshrub in arid desert area. They have narrow distribution area, living in groups, thenatural regeneration is weak, according to the research, the Ammopiptanthusmongolicus population is declining, natural resource in drying up, which need toprotect. So the construction technology of Ammopiptanthus momgolicus has a greatsignificance. The experiment through the survey of Ammopiptanthus momgolicus inBeiza, to determine whether the populations can be reproduced naturally, provided theability of artificial populations. Analyzing the population consists, characters, growthand distribution pattern, to provide the realistic basis for the population construction.By investigating the populations and population characteristics, compared the growthbetween the artificial and the natural, analyzed the deficiency of the artificial, givingadvice and suggestions to artificial populations. Through the artificial communitystructure analyzed with layer analysis method, finding the best community pattern forit. By comparing the emergence rate and growth in different site conditions, findingthe best condition for growth. Experiment on seeding ways and the growth afterdifferent treatments, participated in compiling the local standards and getting thetechnical measures about introduction. Through analysis results determined the keytechnology about population construction. The basic conclusions are as follows:(1)In the survey of natural Ammopiptanthus momgolicus population in BeizaMountain we could find that: generally in the population, the Ammopiptanthusmomgolicus formed single excellent community at tailo, half-tailo and half-ubac, theReaumuria soongorica formed single excellent community at ubac and ridge, thedominant species in herbage were Stipu glarease and Artemisia capillaries, usuallywith Asterothamnus alyssoides, Caragana roborovskyi and so on.(2)The population grew best at half-ubac, the crown size and height weresignificantly higher than tailo, half-tailo and ridge. The indexes of Ammopiptanthusmomgolicus at half-tailo were higher than tailo and ridge a little. The age structure at tailo and half-tailo were stable, the half-ubac was increasing, the ridge was stable. Indifferent slope aspects had distribution pattern, at tailo, half-tailo and ridge, thedistribution pattern of A.monglicus population was clump distribution, the ridge wasuniform distribution. The pattern scales were such as: tailo is4m*8m, half-tailo is4m*4m, half-ubac is8m*8m, ridge is4m*8m.(3)The age structure of natural population was stable, the artificial populationwas declined. The difference in height among natural and artificial population whichhaving different age structure was not significant, but there was one significantdifference in crown size. The main reasons for the lacked stability in artificialvegetations were as follows: Forest land nutrient was depleted and land capability wasdeclined; Human interference blocked the nutrient cycling of the forest; Changes inthe biological cycle because of the single species led to a physical of soil worsen; Thehabitats was simple, pests and diseases broke out largely; The artificial vegetation soilwas xeric in arid and semi-arid areas of northern.(4)The comprehensive scores of each community pattern from high to low wereas follows: A1was72.9420, A6was70.9770, A3was58.3640, A5was55.8915, A2was50.8735, A4was46.4110. The highest community pattern was higher than the lowestpattern26.531, there was a significant difference in growth status about differentcommunity patterns.(5)Through the analysis, the highest emergence rate was in barren mountains,the lowest was in shifting sand dunes. The best planting pattern was the line spacingto10cm, pouring enough water before sowing, covering shade after planting and setsand-barrier for each quadrat. The highest emergence rate was in late April andemerging time was in half a month or so. The optimum temperature about seedingemergence was about10degrees and planting period had better choose in late April.There was one significant difference in total biomass and leaf number of two yearswhich between barren mountains, fixed dunes and shifting sand dunes, but thedifferences in main-root length and roughness were not significant.(6) We could grow the Ammopiptanthus momgolicus in many areas of Gansuprovince, population construction not only focused on the key technology of planting,also paid attention to ready to equipment in the later management and knew wellabout the growth, took effective measures if a problem arises. The whole work will bedone orderly.