摘要
在天山北麓呼图壁县的草甸盐土区域,进行了由农业、生物、化学及水利相结合的综合改良措施。改良试验结果表明：改良地速效Mn含量在1.59-4.90 mg/kg,分布特点是：前期0-15 cm〉15-30 cm≥30-60 cm;中期0-15 cm≥15-30 cm〉30-60 cm;后期为0-15 cm〉15-30 cm〉30-60 cm。草木樨结合施有机肥和石膏,有牧草植被生长时0-60 cm内速效Mn含量有小幅度减少,而无植被时速效Mn在15-30 cm,30-60 cm内明显增加。总量在767.51-914.42 mg/kg,分布特点是：0-15 cm〉15-30 cm〉30-60 cm。Mn总量微弱增加,增加率均小于15%。单种草木樨结合施有机肥促进总量Mn在0-30 cm内积累。
An experiment of meadow saline soil improvement with some farming, biological and chemical measures as well as the improvement of irrigation works is carried out in the northern piedmont of the Tianshan Mountains. The results show that the available Mn content in the improved soil varies in a range of 1.59 - 4.90 mg/kg. The distribution of available Mn content in the improved soil is in an order of 0 - 15 cm 〉 15 - 30 cm ≥ 30-60 cm at the early stage of the experiment, an order of 0-15 cm ≥ 15-30 cm 〉30-60 cm at the metaphase, and basically an order of 0 - 15 cm 〉 15 -30 cm 〉 30 -60 cm at the late stage. The available Mn content in soil of 0 -60 cm in depth is slightly decreased in the Melilotus suaveolens field where organic fertilizer with plaster is applied, and there is no obvious increase of available Mn content in soil of 15 - 30 cm and 30 - 60 cm in depth in the field where there is no vegetation. The total content of available Mn in soil varies in a range of 767.51 914.42 mg/kg, and its distribution is constantly in an order of 0 - 15 cm 〉 15 - 30 cm 〉 30 - 60 cm. The total Mn content in soil is slightly increased with an increase rate less than 15%. Mn accumulation occurs in soil layer of 0 -30 cm in the Melilotus suaveolens field where organic fertilizer is applied.
出处
《干旱区研究》
CSCD
北大核心
2009年第3期361-365,共5页
Arid Zone Research
基金
自治区教育厅科研计划项目(XJEDU2006S17)
土壤学自治区重点学科项目
关键词
草甸
盐土改良
锰元素
呼图壁
天山北麓
soil improved
meadow saline soil
microelement manganese
distribution
change.
