摘要
以农田、露天菜地为对照，研究了山西阳高连作1、4、7、11、14、17a设施栽培土壤pH值、养分含量及其相互关系。结果表明，与农田相比，设施栽培菜地土壤pH值降低、养分含量升高，差异达显著水平。随种植年限增加，设施内0～20cm、20～40cm土层有机质、碱解氮、有效磷含量表现出先升高后降低的趋势。依据设施菜地土壤养分含量标准，阳高设施土壤pH值、有机质、速效钾含量处于适宜水平，碱解氮含量较高，有效磷严重超标。相关分析表明，土壤pH值与速效钾含量间呈显著负相关，各土壤养分含量间呈显著正相关。当地设施蔬菜生产中的不合理施肥，已导致土壤化学性状发生明显变化，今后应推广科学施肥。
With farmland and open vegetable fields as control, soil pH value, nutrient contents and its relations in protected cultivation soil with continuous planting years （ 1, 4, 7, 11, 14, 17 a） in Yanggao County were studied. The results indicated that pH value significantly decreased, nutrient contents obviously increased in protected cultivation soil in comparison with farmland. With increasing of cropping years, organic matter, alkalihydrolyzable N and available P contents in 0 20 cm and 20 40 cm soil increased within shortterm and reduced beyond some years. According to the criteria of soil nutrient contents for protected vegetable soil, pH value, organic matter and available K contents were ap propriate, alkalihydrolyzable N was high, and available P was seriously over proof in protected cultivation soil in Yang gao County. Correlation analysis showed that there were negative correlation between pH value and available K content, and positive correlation between every two soil nutrient .contents. In short, soil chemical properties had been changed clearly due to irrational fertilization in protected cultivation, we should promote scientific fertilization in the future.
出处
《干旱地区农业研究》
CSCD
北大核心
2012年第5期133-137,共5页
Agricultural Research in the Arid Areas
基金
山西大同大学青年科研项目(2010-Q-15)
山西大同大学高寒作物研究所科研项目(2009-Y-14)
关键词
晋北地区
设施栽培
种植年限
土壤养分
north area of Shanxi Province
protected cuhivation
planting years
soil nutrient
