摘要
为了解锡林郭勒草地土壤主要养分的分布及变化规律,利用2006—2011年土壤主要养分测定资料,应用一元线性回归、线性倾向估计、相关分析等数理统计方法进行分析。结果表明:锡林郭勒草地土壤主要养分有机质、全氮、全磷、全钾含量分别为22.371、1.053、0.36、23.737 g/kg,逐层0~5,5~10,10~20,20~30 cm含量变化趋势均随着深度的增加而递减,平均递减率分别为-0.361、-0.031、-0.004、-0.051(g/kg)/cm,且存在一定的相关性。逐年变化趋势有机质呈显著上升趋势,趋势相关系数为0.8087,通过0.05显著性水平检验,上升速率为1.457(g/kg)/年。全钾呈显著下降趋势,趋势相关系数为-0.903,通过0.001显著性水平检验,下降速率为2.4806(g/kg)/年。全氮、全磷变化趋势不显著,变化速率分别为0.015、0.012(g/kg)/年,不同草原类型土壤养分变化与总体存在一定差异。
To understand the distribution and change of soil nutrients in Xilinguole grassland, we analyzed the data of soil nutrients between 2006 and 2010 using the methods of mathematical statistics such as monadic linear regression, linear tendency estimates and correlation analysis, ect. Results showed that the content of organic matter, total N, total P and total K in soil were 22.371, 1.053, 0.36 and 23.737 g/kg, and decreased with increasing layer depth along were-0.361,-0.031,-0.004,-0.051 (g/kg)/ 0-5, 5-10, 10-20, 20-30 cm, which decline rate cm, and also had some correlation in organic matter, total N, total P and total K. The content of organic matter has been a significant rise from year to year, and the correlation coefficient between content and years was -0.8087 and passed 5% level of significance. There had otherwise been a notable downtrend with total K and the correlation coefficient was-0.903 and passed 5% level of significance. Change trend of total N and total P were not obvious and the rate were 0.015, 0.012 (g/kg)/year. In general, soil nutrients were some different in different types of grassland.
出处
《中国农学通报》
CSCD
2013年第32期286-290,共5页
Chinese Agricultural Science Bulletin
基金
锡林郭勒盟科技局科研项目"锡林浩特地区太阳紫外辐射与紫外线指数预报应用研究"(201205)
关键词
有机质
全氮
全磷
全钾
organic matter
total N
total P
total K