为探寻更加高效的复合型改良剂，以为盐碱地改良与合理利用提供参考，通过田间试验，探讨了脱硫石膏、黄腐酸钾和稻壳3种物料不同配比施用对盐碱土理化性质及植物生长的影响，筛选最佳复合物料添加比例。结果表明：与对照组相比，不同物料配比处理下0~20和20~40 cm土壤pH均有显著降低，分别降低了3.1%~9.0%和4.1%~8.5%；0~20 cm土层的土壤盐分含量也显著降低，土壤中HCO3-、Cl-、Na+含量分别降低了6.1%~39.4%、18.0%~34.1%和2.7%~33.6%，其中稻壳、黄腐酸钾和脱硫石膏配比为5-1.2-9 t/hm2和15-0.4-9 t/hm2时对HCO3-、Cl-、Na+降低效果最为明显；不同物料配比复合改良剂均能提高土壤有机质、碱解氮、有效磷含量与景天植株生物量，与对照组相比，有机质增加了3.0%~45.8%、碱解氮增加了16.1%~111.8%、有效磷增加了59.5%~154.8%、景天生物量增加了7.1%~47.6%。效应综合评价的主成分分析结果表明，稻壳、黄腐酸钾和脱硫石膏配比为5-1.2-9 t/hm2是滨海盐碱土最适宜的生物化学复合改良剂组分。
In order to find a more efficient compound amendment, this study analyzed soil physiochemical properties and plant growth indicators by a field experiment and investigated the effects of mixed amendments of desulfurized gypsum, potassium fulvate and rice husk. The results showed that compared to CK, soil pH in 0-20 cm and 20-40 cm were reduced significantly, by 3.4%-9.0% and 4.1%-8.5%. After applying composite modifier, soil salt contents decreased, and the concentrations of HCO3-, Cl- and Na+ were decreased by 6.1%-39.4%, 18.0%-34.1% and 2.7%-33.6%, respectively. Among them, when the ratio of rice husk, potassium fulvic acid and desulfurized gypsum was 5:1.2:9 t/hm2 and15:0.4:9 t/hm2, the reduction effects of HCO3-, Cl- and Na+ were most obvious. Compared with CK, the contents of soil organic matter, available nitrogen, available phosphorus and the yield of plant were increased by 3.0%-45.8%, 16.1%-111.8%, 59.5%-154.8% and 7.1%-47.6%, respectively. Principal component analysis of evaluation on comprehensive effect proved that the optimal ratio of rice husk, potassium fulvic acid and desulfurized gypsum is 5:1.2:9 t/hm2 for biochemical compound modifiers on coastal saline-alkali soil.
唐雪,尚辉,刘广明,姚宇阗,张凤华,杨劲松,周龙祥,储睿.复合改良剂对盐碱土改良及植物生长的影响[J].土壤,2021,53(5):1033-1039. TANG Xue, SHANG Hui, LIU Guangming, YAO Yutian, ZHANG Fenghua, YANG Jingsong, ZHOU Longxiang, CHU Rui. Effects of Combined Amendment on Improvement of Salinized Soil and Plant Growth[J]. Soils,2021,53(5):1033-1039复制