不同年限温室土壤磷素变化分析  

Changes in Soil Phosphorus with Years in Greenhouse

作　　者：张敬敏[1,2,3] 赵娜 魏珉 赵利华[2] 隋申利 ZHANG Jing-min;ZHAO Na;WEI Min;ZHAO Li-hua;SUI Shen-li(Weifang University of Science and Technology, Facility Horticulture Laboratory of Universities in Shandong, Shouguang 262700,China;Shouguang Ou-yate Vegetable Limited Company, Shouguang 262704, China;College of Horticulture Science and Engineering,Shandong Agricultural University, Tai'an 271018, China)

机构地区：[1]潍坊科技学院山东省高校设施园艺实验室,山东寿光262700 [2]山东寿光欧亚菜有限公司,山东寿光262704 [3]山东农业大学园艺科学与工程学院,山东泰安271018

出　　处：《土壤通报》2019年第3期597-601,共5页Chinese Journal of Soil Science

基　　金：“十二五”国家科技支撑计划”（2014BAD05B03）;山东省高校设施园艺实验室（2018YY003）;山东省重点研发计划（公益类）项目（2019GSF109113）资助

摘　　要：温室大量施肥引起土壤磷素水平极高,为明确温室土壤磷素变化特点,以露地土壤为CK,选择种植模式相近、种植年限不同的温室土壤,通过相关分析和通径分析,阐明各形态磷素变化特点及其与有效磷的关系。结果表明:土壤各形态磷素均随种植年限的延长而增加,以Ca8-P和Ca10-P的含量最高。各年限温室土壤Ca2-P、Ca8-P和Al-P均显著高于露地CK,第10年和第14年无显著差异;温室土壤Ca10-P和O-P只在第14年时与CK有显著差异。同年限温室间的极差随年限延长而逐渐加大。温室土壤有效磷、全磷和无机磷总量均显著高于CK,有效磷第10年最高达420.00 mg kg^-1,无机磷占全磷的百分比保持相对稳定。相关分析和通径分析表明,Ca2-P和Ca8-P对土壤有效磷的直接影响和综合影响均呈正相关,而A1-P和Fe-P对有效磷综合影响呈正相关,但直接影响为负相关,这可能与温室土壤pH降低使Fe和Al大量溶解而和磷发生沉淀反应有关。Large application of fertilizers caused high levels of soil phosphorus(P). To clarify the changes of soil P, the relationships among different P forms and available P and their changes were analyzed with correlation and path analyses in greenhouse soil relative to the un-mulched soil(as control) under the similar cropping systems at different planting years. Results showed that various P forms increased with the planting years in greenhouse soil, and the contents of octacalcium phosphate(Ca8-P) and lime type P(Ca10-P) were the highest. The contents of dicalcium phosphate(Ca2-P), Ca8-P and aluminum-bound P(Al-P) in greenhouse soil were significantly higher than those in CK, while they were not significantly different between the 10-and 14-year greenhouse. The Ca10-P and occluded P(O-P) showed the significant difference between the 14-year greenhouse and control. The P range between the greenhouse and control with the same planting year was gradually increased with planting years. The contents of available P, total P and inorganic P in greenhouse soil were significantly higher than those in CK. The content of soil available P attained the highest with 420.00 mg kg^-1 in the 10-year greenhouse. The percentage of inorganic P in total P remained relatively stable. Correlation analysis and path analysis showed that the Ca2-P and Ca8-P had positive direct and combined effects on soil available P. However, Al-P and Fe-P had positive combined effects and negative direct effects on soil available P. This could be due to the decrease in greenhouse soil pH, which led to the precipitation reaction between dissolved-Fe and-Al and P.

关 键 词：温室土壤 磷素 相关分析 通径分析 

分 类 号：S157.4[农业科学—土壤学]