Reproduction Strategy And Transplant Experiment Of Kobresia Humilis

In the research, we studied growth regulation, reproduction strategy in grazing disturb and manual transplant experiment of Kobresia humilis, explored general growth regulation and occur, growth, mature, death and ramet forming of new tillers, analysed tiller numbers, ramet numbers, procreation branch numbers and reaction of different genets area in different grazing intensity, understood transplant and survive circs of genets, ramets, tiller-team, single tillers and increase of tiller numbers, growth and reproduction character in different stubble length cutting treatment. The results is following:1.Buds of Kobresia humilis are produced in the second or third leave of tillers mostly, one tiller can produce 4 buds in growth-season and there are 5 leaves at the end of growth-season mostly, and new buds produced in summer only has 2-3 leaves at the end of growth season. Roots are generally produced from back or side of tillers while the fifth leave is produced from bud. New bud produced from tillers which is called two-age-tiller means tillers have matured on nutrition level. Three or four years later, one without branch flower-bud will be produced in the center of main tillers mostly before autumn into winter and few in spring. In second spring, spikelets have presented obvious differentiation and it means tillers have gotten into reproduction stage.2.Kobresia humilis finished tassaled in the middle ten days of May, reached to florescence in the first ten days of July, formed fruit rudiment in the middle days of July or first June, fruit matured in last June and first ten days of August. It will produce 3-7 fruits per spikelet and about 48 percent pistil develop into fruit. Anthotaxy is 9.5 to 11.9 mm long, the number of spikelet reach to 7.2 to 10.2/ anthotaxy, spikelet is 4.1~5.1mm long, the number of female-flower reach to 6.2~13.7 anthotaxy,female-flower/spikelet reach to 0.71 to 1.60/ spikelet, the number of fruit is 3.0 to 6.6/ anthotaxy. Nature senescence and death of Kobresia humilis tillers is due to death of two-age-tillers and nutrition tillers develop into procreation tillers which live tillers-team is grown into ramet after florescence, burliness and death. Kobresia humilis often form"loop"genet according to age increase of clonal genet.3.Different grazing intensity makes different impression on different Kobresia humilis genet and grazing intensity make less impression on big genet ramets numbers, tiller numbers and stalk numbers. Moderate grazing is useful for increasing ramets, and low-grade grazing or no-grazing make against to form ramets. Average stalk tiller numbers of all kind of genet make no obvious difference in different grazing intensity, and it make less impression on average stalk tiller numbers of Kobresia humilis in different grazing intensity five years later. Genet area and average stalk tiller numbers of genet present no obvious difference in different grazing intensity.4.The number of tiller present obvious difference in different cutting treatment at the end of growth-season. Average leave per tiller of genet present few change in different grass cutting, and leave per tiller of ramet which 3cm stubble or no-cutting make obvious difference. It present high-scale growth and mostly reach to 19.8cm after leave of genet is transplanted,leave of ramet reach to 12.4 cm and leave of tiller-team reach to 10.3 cm at tiptop. Tiller-team reproduced quickest, it reproduced quicker in no-cutting condition and slower in stubble condition.