“木奇”覆盖对城市绿地土壤主要理化性状的影响

Study on the effect of “Muqi” on main physicochemistry properties of soil in urban green space

以河南农业大学校园绿地土壤为例,选取土壤碱解氮、速效磷、速效钾、有机质、pH值、温度、保水能力、渗透性为指标,通过野外试验和控制试验,探讨"木奇"(Mulch)对城市绿地土壤的影响。结果表明,"木奇"可有效提高土壤碱解氮、速效钾以及有机质含量,与裸土相比分别平均增加了41.74%、53.22%、22.20%;覆盖处理对改善土壤pH值及调节土壤温度、保持土壤恒温起到积极作用,且铺设9 cm"木奇"的处理对改善土壤pH值和夏季对土壤降温、冬季保温的综合效果最好;"木奇"能有效增强土壤保水能力并延缓地表径流的发生,其覆盖下的土壤含水量和土壤渗透系数与裸土相比分别提升了23.60%和61.97%。

Taking the green space soil of Henan Agricultural University campus as an example,and selecting the soil alkalized nitrogen,available phosphorus,available potassium,organic matter,pH value,temperature,water holding capacity,and permeability as indicators,field experiments and control experiments were conducted to explore the effect of“Muqi”(Mulch)on urban greenland soil.The result showed that“Muqi”could effectively increase the content of soil alkali-hydrolyzable nitrogen,available kalium and soil organic matter,and the content of these indicators of the soil covered with“Muqi”increased by 41.74%,53.22%and 22.20%respectively,compared with the bare soil;“Muqi”could also reduce the soil pH value and keep the soil temperature steady,and 9 cm treatment worked best;Besides,“Muqi”had the advantage of maintaining soil moisture and delaying the overland runoff,and the water content and permeability of the soil covered with“Muqi”increased by 23.60%and 61.97%,respectively,compared with the bare soil.