【摘 要】
：
利用因子分析、相关分析和模糊数学原理 ,针对渍害土壤的 1 0项肥力指标进行了土壤肥力的综合评价。根据S型或抛物线型作物效应曲线建立各项肥力指标的隶属度函数 ,计算出隶
【机 构】
：
湖北农学院涝渍地研究中心,湖北农学院涝渍地研究中心,湖北农学院涝渍地研究中心,日本JICA派驻项目专家 荆州434103,荆州434103,荆州434103,荆州434103
论文部分内容阅读
利用因子分析、相关分析和模糊数学原理 ,针对渍害土壤的 1 0项肥力指标进行了土壤肥力的综合评价。根据S型或抛物线型作物效应曲线建立各项肥力指标的隶属度函数 ,计算出隶属度值 ,并按各肥力指标的公因子方差、相关系数确定其权重系数 ,从而求得各渍害类型土壤肥力综合指标值 (IFI) ,检验两种方法的IFI与其对应的水稻产量间的相关性 ,表明均达极显著水平 (r=0 75 2 1 ) ,说明综合评价结果能较好地反映出土壤的肥力。
Using factor analysis, correlation analysis and fuzzy mathematics, soil fertility was evaluated comprehensively for 10 soil fertility indexes. According to the S-type or parabolic curve, the membership function of each fertility index was established, and the membership value was calculated. According to the variance of common factors of each fertility index and the correlation coefficient, the weight coefficient was calculated, IFI, the correlation between IFI and rice yield of the two methods showed that both of them reached an extremely significant level (r = 0 75 2 1), indicating that the comprehensive evaluation results can better reflect the soil Fertility.
其他文献
教师专业化进程要求传统的教师职业道德向更体现公共服务性、专业自主性的教师专业伦理发展。运用问卷法、访谈法等多种方法,以教师意愿为主体,辅之以学生的视角,尝试建构教
It is well known that forest carbon or sink projects have not been included in theClean Development Mechanism (CDM), one of the flexible mechanisms created und
On the basis of the deep geology and the geological structure of Huangtupo landslide, an ancient landslide in the reservoir of the Three Gorges, the geo-environ
An experiment on evapotranspiration from citrus trees under irrigation with saline waterwas carried out for 4 months. Two lysimeters planted with a citrus tree
In east Asia, acidic gases derived from fossil fuel combustion have increased in the pastdecades. On the other hand, the Asian dust, also called Kosa (yellow sa
Coesite was discovered as inclusions in zircon separates from pelitic gneiss associated with a large eclogite body in the North Qaidam ultrahigh-pressure (UHP)
In order to study climatology of yellow sand (Asian sand, Asian dust or Kosa) in EastAsia, secular fluctuation in China, Korea and Japan in the recent 30 years
Simultaneous observations at Zhongshan Station, Antarctica, during May 1-7, 1998 are presented to show the responses of the polar ionosphere to the April/May 19
Stellar nucleosynthesis yield is a vital factor of galactic chemical evolution model. With different yields, various evolutionary behavior of elements can be pr
近年来,生猪市场暴涨暴跌频繁,中国经济波动严重受到猪肉价格走势的左右,引起了社会各方面的广泛关注。缓解生猪生产周期性波动,维护生猪市场的平稳健康发展,对于保障我国食