摘要
自以同一方案连续12 a进行定位灌溉试验的栽培番茄保护地,分层采集0-100 cm土层的土壤样本,研究了灌溉方式对保护地土壤全磷、速效磷（Olsen-P）含量及其剖面分布的影响。结果表明,0-60 cm土层土壤全磷、速效磷含量明显高于60-100 cm土层;土层不同灌水处理间土壤全磷、速效磷含量及其剖面分布0-60 cm土层表现出了明显差异,总体上沟灌和滴灌高于渗灌,而沟灌和滴灌之间差异不明显;速效磷占全磷比例在0-40 cm土层以滴灌处理为最高,其它两灌溉处理相对较低;与滴灌、渗灌处理不同,沟灌处理土壤的速效磷占全磷比例随土层深度增加变化不明显。相关分析结果表明,各灌溉处理土壤速效磷与全磷之间呈极显著正相关关系,而全磷、速效磷含量与有机质间呈显著的指数正相关关系。
Different irrigation treatments were conducted to study the effects of the profile distribution（0～100 cm）and contents of total-P and Olsen-P in a 12-year tomato-grown protected land in the bases for scientific research of shenyang agricultural university.Results showed that at the depth of 0～60 cm the contents of total-P and Olsen-P were significantly higher than the depth of 60～100 cm.Among these irrigation treatments the profile distribution and contents of total P and Olsen-P displayed significant difference at the depth of 0～60 cm. Generally the contents of furrow irrigation and drip irrigation were both higher than infiltration irrigation but there were no differences between furrow irrigation and drip irrigation.At the depth of 0～40 cm the highest percent of Olsen-P fractions to total-P was drip irrigation treatment.Compared with drip irrigation and infiltration irrigation treatment,the ratio of Olsen-P to totalP showed unconspicuous change along with the depth of soil profile in the furrow irrigation treatment.The result of correlation analysis showed very significant positive correlation in the different irrigation treatment between total-P and Olsen-P and there were significant positive exponent correlation between Olsen-P and total-P with organic matter.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第4期213-216,222,共5页
Agricultural Research in the Arid Areas
基金
辽宁农业科技攻关重大项目(2008212003)
辽宁省教育厅优秀人才支持计划项目
关键词
保护地
节水灌溉
土壤磷素分布
protected land
water-saving irrigation
soil phosphorus distribution
