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种植互花米草的盐沼土中,细菌、放线菌和真菌的数量比对照盐沼土中多。就不同深度来说,15—30厘米土层中,细菌数最多。细菌总数的增减趋势是:夏秋两季最多,冬春两季较少。在各生理类群中,氨化细菌占优势;固氮细菌、硝化细菌次之;反硝化细菌和硫酸盆还原细菌最少。内源呼吸作用强度、添加葡萄糖后的呼吸作用强度、氧化丙酮酸的能力和氧化多酚化合物的能力皆显示出同样的趋势,即三年生草场土壤中生物活性最强,光滩土壤中生物活性最弱。在光滩土壤中,脲酶和过氧化氢酶活性很低,而种植互花米草的土壤中这两种酶活性较强,但与种植年限和季节变化无显著相关性。
In salt marsh soil planted with Spartina alterniflora, the number of bacteria, actinomycetes and fungi was more than that in the control salt marsh soil. In different depths, 15-30 cm soil layer, the largest number of bacteria. The trend of increase and decrease of the total number of bacteria is that summer and autumn are the most, and winter and spring are less. Among all the physiological groups, ammoniated bacteria predominated; nitrogen-fixing bacteria followed by nitrifying bacteria; and bacteria with the least amount of reducing bacteria in denitrifying bacteria and sulfuric acid basin. The intensity of endogenous respiration, the intensity of respiration after glucose addition, the ability to oxidize pyruvate, and the ability to oxidize polyphenolic compounds all showed the same trend, with the strongest biological activity in the three-year-old pasture soils and the bioactivity in the light-shoal soils The weakest. Urease and catalase activities were very low in the light beach soil, while the activities of these two enzymes in the soil planted with Spartina alterniflora were relatively strong, but not significantly correlated with the years and seasons of planting.