地温影响高寒草甸牧草产量的效应分析

本文采用地温资料建立影响高寒草甸牧草产量的正交多项多积分回归模式，具有一定的实用价值。通过分析表明，回归模式：ＧＷ＝３５９．６「１．９１７６＋αｋ∫＾１１１Ψｋ（ｔ）Ｘ（ｔ）ｄｔ」模式模拟的拟合率较高，平均相对误差为２．３２％，达极显著相关的检验水平。

The Effect Analysis of Soil Temperature Influence on Biomass of aboveground in Alpine Meadow

The biomass of aboveground is a result affected jointly by various ecological environment factors. The soil temperature as a expression of soil heat condition,is one of those factors,which direcily influence on seed germination and plant growth. During different periods of plant growth, the relationship between biomass of aboveground and the soil-temperature is very different. We set up integral regression equotion between soil temperature and yield of alpine meadow grass,the simulation model is:Statistics shows: the model displays significance relation (P<0. 05), and average relative error between the observed value and simulation value was 2 .32%, the result can be used in our studying actual work. The results showed: from June to July, the effect of soil-temperature on biomass of aboveground was negative, rest months was positive. Especially from the second ten-day period of April to the last ten-day period of May, its positive correlation effect was very obvious, it was possible that soil water loss decrease since low soil-temperature in winter, freezing soil was helpful for soil to contain water.