文档介绍：贵州大学 2009 届硕士研究生学位论文黔中地区旱地土壤肥力指标及综合评价研究
黔中地区旱地土壤肥力指标及综合评价研究
摘要
通过大田试验研究了当前土壤肥力评价的热点指标土壤微生物量氮、作物光
温指数,并在黔中地区采集、分析土壤样本的基础上,结合种植的不同作物,从
土壤养分、土壤理化性状、土壤环境因素、作物光温指标方面评价土壤肥力,主
要研究结果如下:
、不同施肥量,土壤肥力水平有密切的关系,可以
用叶面积指数来表征作物的光温指数。
,土壤微生物量
氮与植物所吸收利用的氮量基本吻合(校正系数 %),土壤微生物量氮的基础
含量能够表征土壤的供氮能力,可以作为表征土壤肥力的指标。
,选取土壤养分、土壤理化性状、环境因素指标以及不
同作物在不同地区的光温(气候)生产潜力指数作为评价指标;根据不同的作物
生产效应采用不同隶属度函数,并将曲线型函数转化为相应的折线型函数;采用
特尔菲法确定指标的权重,从而构建不同作物下的土壤肥力指标体系。通过指数
和法获得黔中地区不同作物的土壤肥力综合评价指数。
,可用于土壤对作物的适宜性分析。
对于同一块旱地,不同作物对应下的土壤肥力综合评价指数的等级各不相同,等
级越高,表明适宜性越好。
关键词: 土壤微生物量氮;叶面积指数;土壤肥力综合评价;作物
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贵州大学 2009 届硕士研究生学位论文黔中地区旱地土壤肥力指标及综合评价研究
R esearch on Dryland Soil Fertility Index
and the C omprehensive E valuation in the
Center of Guizhou
Summary
Hot index (soil microbial biomass nitrogen,light and temperature of crop index ) of
current soil prehensive evaluation was studied in this paper according
field experiment, and based on experiment of wide collection and analysis soil sample
in central Guizhou province ,combined with different crops ,from soil nutrient ,soil
structure, soil physicochemical characters, soil environmental factors, light and
temperature of crop index aspects , comprehensive evaluation soil fertility, the main
results are as follows:
1. The study on the relationship between the leaf area index and crop index of
light and temperature, crop yield, soil fertility has shown that they are closely related,
and the light and temperature index of crop can be represented by the index of leaf
area.
2. The study on soil microbial biomass nitrogen as soil fertility index have shown
that, microbial biomass nitrogen can better reflect nitrogen which plant absorb and
use than the nitrogen, soil microbial biomass nitrogen basically tallies nitrogen which
plant absorb and use (correction factor %), basic content of soil microbial
biomass nitrogen can represent N-supplying capacity of soil,