摘要
为探索发酵玉米秸秆施加到盐碱土后对土壤肥力指标的影响,将未发酵的玉米秸秆作为对照,采用盆栽试验方法对比分析了不同比例(1∶1、2∶1、3∶1、6∶1)秸秆和污泥混合发酵的玉米秸秆分别以不同用量(1.25、2.50、3.75、5.00 g/kg)施加到盐碱土后土壤肥力指标的变化。结果表明,施加发酵后的玉米秸秆,土壤有机质、速效钾质量分数显著增加,土壤速效氮和速效磷质量分数有所降低。经比较分析,施加2.50 g/kg发酵比例为2∶1的玉米秸秆对土壤肥力指标及土壤酶活性的影响最为显著,其中,土壤微生物量碳、氮分别较原土提高了0.90倍、1.07倍;土壤碱性磷酸酶、脲酶、纤维素酶、过氧化氢酶分别较原土提高54.47%、37.00%、33.82%、59.77%。
We investigated the effects of fermented corn straw on fertility of saline-alkali Soil based on pot experiments by taking unfermented corn straw as the control. In the experiment, we analyzed the changes in soil fertility after applying a mixture of straw and slugged fermented corn straw at ratios of 1 ： 1, 2： 1, 3： 1, and 6： 1, at application rates of 1.25 g/kg, 2.50 g/kg, 3.75 g/kg and 5.00 g/kg respectively to a saline-alkali soil. The results showed that applying fermented corn straw significantly improved soil organic matter and bioavailable potassium, but decreased the bioavailable nitrogen and phosphorus. When the ratio of straw to fermented corn straw was 2：1 and the application rate was 2.50 g/kg, the microbial biomass-C and N were enhanced and they were 0.90 times and 1.07 times higher than those in the original soil; the soil enzymatic activity also increased significantly. In particular, the alkaline phosphatase, urease, cellulase and catalase increased by 54.47%, 37.00%, 33.82%, 59.77% compared to those in the original soil.
出处
《灌溉排水学报》
CSCD
北大核心
2017年第12期56-61,共6页
Journal of Irrigation and Drainage
基金
内蒙古自治区自然科学基金项目(2016MS0405
2016MS0221)
内蒙古科技大学产学研合作培育基金项目(2016CXY03)
关键词
玉米秸秆
发酵
盐碱土
土壤肥力
corn straw
fermentation
saline-alkali soil
soil fertility
