摘要
于2007年10月下旬收集克拉玛依市区北郊防护林内新疆杨、胡杨和尖果沙枣凋落叶,分别通过埋土及埋土+速腐增效剂处理与3种凋落叶自然分解进行比较,开展为期一年的分解实验。结果表明:埋土及埋土+速腐增效剂处理均能促进凋落叶的分解,并且随分解时间延长,这种促进作用日益明显。虽然,埋土及埋土+速腐增效剂处理对3种凋落叶分解过程中养分含量的影响因凋落叶基质质量的差异有所不同,但总体来看,埋土处理有效提高了凋落叶分解过程中P元素和Ca元素含量,使K元素含量略低于对照。与埋土处理比较,埋土+速腐增效剂处理显著提高了新疆杨凋落叶的分解率,使3种凋落叶分解过程中N,P,Ca,Mg元素的含量有明显提升,促进了K元素的淋洗。与对照相比,2种处理均加快了有机C的分解;埋土处理仅降低了尖果沙枣凋落叶分解过程中的C/N值,埋土+速腐增效剂处理使3种凋落叶分解过程中的C/N值均大幅下降。
Leaf litters of Populus alba var.pyramidalis,Elaeagnus oxycarpa and Populus euphratica were collected in October 2007.Two treatments of covering soil and covering soil ＋ quickly decomposing synergist were employed with the litter bag technique for one year.The results indicated that the treatments of covering soil and covering soil ＋ quickly decomposing synergist could accelerate the decomposition rate of the three leaf litters,and the promotion effect was more obvious with the time.Covering soil improved the phosphor content and calcium content and reduced the kalium content in the three leaf litters.The effects of the treatments on the nutrient content of the three leaf litters were different because of the difference of substrate quality.Compared with covering soil,covering soil ＋ quickly decomposing synergist increased the decomposition rate of leaf litter of P.alba var.pyramidalis significantly,improved the contents of nitrogen,phosphor,calcium and magnesium effectively,and promoted the leaching of kalium in the process.The treatments also accelerated the decomposition of organic carbon.Covering soil decreased the C/N value of leaf litter of E.oxycarpa only.Covering soil ＋ quickly decomposing synergist decreased the C/N values of the three leaf litters obviously.
出处
《干旱区研究》
CSCD
北大核心
2010年第5期726-733,共8页
Arid Zone Research
基金
新疆克拉玛依市科技局科技计划项目(SK2007-01)
关键词
凋落物
分解调控
养分变化
微生物菌剂
克拉玛依
新疆
leaf litter
decomposition regulation
nutrient variation
microbial inoculum
Karamay
Xinjiang.
