【摘要】 对中度和重度盐碱化草地采取铺沙+补播、施有机肥+补播两种修复处理措施,研究枯落物分解一年期间的质量残留率及养分残留率。结果表明:枯落物分解一年后各处理中枯落物分解速率快慢依次为对照>施有机肥>铺沙,处理间差异显著;中度盐碱化草地枯落物质量残留率、木质素、碳、氮和钾残留率等均高于重度盐碱化草地,纤维素残留率低于重度盐碱化草地;枯落物的残留率与碳、钾含量呈正相关,与纤维素和木质素含量呈负相关。更多还原

【Abstract】 The mass and nutrient residual rates of litter decomposition in moderate and severe saline-alkali grassland were studied by sand-spreading + reseeding and organic fertilizer + reseeding two restoration treatments, the results showed that the decomposition rate of litter was in the order of control > organic fertilizer > sand-spreading after one year of litter decomposition, with significant difference among treatments. Litter mass residue rate, lignin, carbon, nitrogen and potassium residue rate of moderately salinized grassland were higher than those of severely salinized grassland, while cellulose residue rate was lower than that of severely salinized grassland; the residue rate of litter was positively correlated with the content of carbon and potassium, but negatively correlated with the content of cellulose and lignin.更多还原