The Stoichiometry Of Mosla 6 Species Ecological Differentiation

We have finished the study of endangered species M. hangchowensis all-around since 1993, we also studied the other two species M. chinensis and M. dianthera 's requirement to light and water aiming at the mechanism of species endangered and weediness. We have explored an effective experiment methods of field observation and planting controlled. Although we have found valuable breakthrough point, only a few species individual resource axis 'work.. The study makes the best of Mosla plant which a group uncommon mode material to evolution and ecology study. Based on the former research , we study the Ecological Stoichiometry of Mosla 6 species in 8 which ecological differentiation at nutrition and light resource axis and the relationship between habitat source and nutrition in plants. We offered evidence to speciation by close ecological experiment.We studied the 6 species out of 8 in Mosla's content character between soil nutrient and plant nutrient , the ratio relationship of elements ,the correlativity between soil and plant nutrient, the relationship between soil nutrient and plant biomass, the relationship between plant nutrient and plant biomass and the Ecological Stoichiometry character of plant under different light intensity and the biomass, accumulation responsed to the different light intensity. The main results and conclusion are as follows:1. There is obvious difference between the same species grown in different habitat and the different species grown in the same habitat's N,P,K in soil more or less, such as M.dianthera, or there is no obvious such as M.scabra; but there is obvious difference between the different species' several elements in same habitat and the same specie in different habitats, for example, there is obvious difference between different habitats of M.dianthera, M.chinensis and M.cavaleriei's most of elements content, it suggest that there is ecological differentiation between Molsa species.2 . There is nearly no obvious difference between the same species' leaf nutrients grown in different habitat ,such as M.chinensis, M.scabra and M.soochowensis; but there is obvious difference of main nutriens between M.dianthera grown in different habitats ; thus we conclusion that M.dianthera has better plasticity to nutrients absorb, it can adapt to different nutrients habitat, so it distributes widely. Other species keep the same level of elements absorb though there is habitat difference , less widely than M.dianthera。The Mosla species leaf N, P, K content of different species and different habitat suggest that the absorb strategy is different between different habitat; M.dianthera can have different strategy in different habitat, so it disturbed widely, but M.chinensis only has one ability to absorb soil elements ,thus it requires the elements contents in the soil leading to disturb narrow.We can conclusion that though there is obvious difference between different habitat, there is no obvious difference at the absorb soil elements absoluteness, especially the absorb of microelement.3. We estimate that Mosla species are N and P limited whether nature habitat or controlled experiment the Mosla species grown , M.hangchowensis is only N limited, but other species are still P and K limited. M.scabra and M.dianthera have widely sidtributing at N, P, K content. The Mosla species grown in the same habitat have the same limited type. Different species have differents limited degree.4 . Plant always distribute more elements resource to leaf instead stem, it maybe because of the leaf is mainly photosynthesis but stem relating to transmit. The plants biomass is increasing and the elements concentration decreasing as the light intensity stronger. When light intensity and nutriens is enough ,there is no obvious differences between Mosla species growth and elements absorbing; when light intensity and nutrients is poor , M.scabra and M.dianthera have better plasticity, they can regulate themselves to reduce the disadvantage effects of environmental.5. We can conclusion that there is correlation between soil nutrients and main elements plants needed through the relationship between elements in leaf, habitat elements and biomass, such as N, P. There are also relativity in Fe and Zn, but Zn is negative. We confer there is dilutedness domino effect in leaf elements absorb through the negative between biomass and N,K in leaf. They are positive between most of soil elements and biomass in leaf: P,Mg,Fe,Cu,Na,Zn et al., it indicates that the more availability elements in soil the more in plants.The habitat nutrition and light intensity have effects on plant growth and distribution.Wide spread species have more plasticity to acclimatization, so they distributing widely, but the endanger species reverse, which have special demand for the habitat, even more it has weak accommodate ability. Therefor, they are ecological differentiation during the adapt.