摘要
在田间试验条件下,通过对花生各生育期土壤养分含量与酶活性的研究,探讨了不同施肥处理对土壤养分含量及土壤酶活性的影响。结果表明:各生育期不同施肥处理土壤养分含量以控释掺混肥处理最高,在整个生育期内都能满足花生对养分的需求,普通复合肥在土壤中养分释放迅速,后期出现脱肥现象;土壤脲酶活性、酸性磷酸酶活性以控释掺混肥处理最高,纯控释肥处理其次,均明显高于普通复肥和对照处理,过氧化氢酶活性受肥料类型的影响较小,变化范围在2.68～6.26ml/g之间;3种土壤酶活性与速效P含量的相关性最好,其中脲酶活性与土壤速效P含量相关性达到极显著正相关,过氧化氢酶活性与速效P含量为极显著负相关,脲酶活性与碱解N含量存在显著正相关,磷酸酶活性与碱解N同样存在显著正相关,过氧化氢酶活性与速效K含量存在极显著负相关。这说明土壤酶活性与土壤养分含量呈密切的相关性,可将其作为评价土壤肥力的指标。
Under the field experimental conditions, we explored the effects of different fertilizing treatments on the contents of soil nutrients and soil enzyme activities. The results showed that： in each growth period of peanut, the contents of soil available nutrients in the treatments of the controlled-release compound bulk fertilizer were highest, which could meet for peanut requirement throughout the whole growth period. The common compound fertilizer released the nutrients quickly in soil thus led nutrient insufficiency later. The activities of urease and acid phosphatase in the treatments of the controlled-release compound fertilizer were much higher than those in the treatments of common compound fertilizer and control. The activity of catalase was less affected by the types of fertilizers, which ranged from 2.68 to 6.26 ml/g. Significant correlations existed between soil enzyme activity and soil nutrient content, positive correlation between urease activity and available P, negative correlation between catalase activity and available P, positive correlation between urease and phosphatase activities and available N, negative correlation between catalase activity and available K. The results indicate the feasibility of soil enzyme activities in assessing soil nutrients and fertility.
出处
《土壤》
CAS
CSCD
北大核心
2010年第2期249-255,共7页
Soils
基金
"十一五"国家科技支撑计划项目(2006BAD10B07)
山东农业大学博士后基金项目(76226)资助
关键词
生育期
土壤酶活性
相关性
Growth period, Soil enzyme activity, Correlation
