沼渣对土壤理化性质和糜子品质的影响

Effects of Biogas Residue on Soil Physical-Chemical Properties and Millet Quality

为研究不同比例的沼渣添加量对土壤理化性质和作物糜子品质的影响,笔者考察沼渣用于有机肥的可行性,为以后沼渣的资源利用方面提供参考。文章以内蒙古托克托县野外大田为试验样地,采用鲁如坤所著土壤农业化学分析方法测定土壤理化指标,参照国家食品标准测量作物糜子品质的各项指标。结果表明,添加沼渣后土壤的水分呈现递增的趋势;CH1的速效磷和速效氮变化显著,分别增加了115.37%和28.59%;CH6的有机质增多了51.31%。同时,添加沼渣后作物糜子的品质有明显提升。在生产品质中地上部生长量和地下部生长量提升显著,分别增长了78.78%和87.5%;而在营养品质中CH2中的水分和总糖的含量增长了22.26%和44.81%,CH6的灰分达到108.7%,CH1脂肪增长24.89%,直链淀粉增加18.89%,CH4支链淀粉提升16.37%。添加沼渣后使得土壤肥力增强,同时对提高糜子品质方面效果显著,说明沼渣可用于有机肥,并得出最适糜子生长的沼渣添加量,为今后糜子产量的增幅奠定了基础。

The effects of different proportion of biogas residue on soil physical-chemical properties and the crop millet quality were studied. The feasibility of using biogas residue as organic fertilizer was investigated,which provided a reference for the biogas residue utilization in the future.Taking the field soil of Tuoketuo County,Inner Mongolia as the experimental sample,the soil physical and chemical properties were determined by the method of Soil Agrochemical Analysis of Lu Rukun,and the quality of crop millet were measured according to the national food standard. The soil moisture showed an increasing trend after adding biogas residue. The available phosphorus and available nitrogen of group CH1 increased significantly by 115.37% and 28.59% respectively,and the organic matter of CH6 increased by 51.31%. Meanwhile,the quality of crop millet was improved obviously after using biogas residue: in view of the production,the above ground and underground growth increased by 78.78% and 87.5% respectively;in view of the nutrition quality: the water content and total sugar of group CH2 increased by 22.26% and 44.81% respectively;the ash content of group CH6 reached 108.7%;the fat and amylose of group CH1 increased by 24.89% and 18.89% respectively;amylopectin of group CH4 increased by 16.37%.After adding biogas residue,the soil fertility was enhanced,and the effect on improving the millet quality was remarkable. The results showed that the biogas residue could be used as organic fertilizer.