羊粪与腐殖酸对盐碱土壤改良及小麦产量的影响

The effects of sheep manure and humic acid on saline alkali soil improvement and wheat yield

【目的】探究增施羊粪与腐殖酸对河北省盐碱地的改良效果。【方法】于河北省临城县开展田间试验,设置不施肥(CK)、单施复合肥(T1)、复合肥+羊粪配施(T2)、复合肥+腐殖酸配施(T3)、复合肥+羊粪+腐殖酸配施(T4)5个处理,分析不同施肥处理对土壤肥力和小麦产量以及土壤物理性质、酶活性、微生物的影响。【结果】相较于CK,各处理可显著提高土壤肥力,T4处理最大增幅为154.81%;小麦产量分别显著增加58.52%、89.25%、83.96%、108.81%(P<0.05),其中,T4处理效果最好;可降低土壤pH值、可溶性盐浓度(EC)、容重,T4处理效果最好,最大降幅分别为6.72%、21.75%、7.75%;可提高土壤孔隙度,T4处理最大增幅为33.94%;可显著提高土壤酶活性(P<0.05),T4处理最大增幅为142.41%;可提高土壤中真菌、细菌、放线菌的数量和微生物总量,T4处理最好,最大增幅分别为158.10%、147.32%、117.99%、145.25%。【结论】增施羊粪和腐殖酸有利于提升盐碱地土壤肥力、增加小麦产量、改善土壤物理性质、提高土壤酶活性和微生物总量,可以作为河北省临城县盐碱土改良的有效手段。

【Objective】To explore the improvement effect of adding sheep manure and humic acid on saline-alkali land in Hebei Province.【Methods】A field experiment was conducted in Lincheng County,Hebei Province,and five treatments were set up:no fertilization(CK),single application of compound fertilizer(T1),compound fertilizer with sheep manure(T2),compound fertilizer with humic acid(T3),and compound fertilizer with sheep manure and humic acid(T4).The effects of different fertilization treatments on soil fertility,wheat yield,soil physical properties,enzyme activities and microorganisms were analyzed.【Results】Compared with CK,soil fertility was significantly improved by all treatments,and the maximum increase of T4 treatment was 154.81%.Wheat yield was significantly increased by 58.52%,89.25%,83.96%,108.81%(P<0.05),and T4 treatment had the best effect.It can reduce soil pH value,soluble salt concentration(EC)and bulk density.T4 treatment has significant effect,and the maximum reduction was 6.72%,21.75%and 7.75%,respectively.Soil porosity could be improved,and the maximum increase of T4 treatment was 33.94%.Soil enzyme activity was significantly increased(P<0.05),and the maximum increase of T4 treatment was 142.41%.The number of fungi,bacteria and actinomycetes and the total amount of microorganisms in soil could be increased by T4 treatment,and the maximum increase was 158.10%,147.32%,117.99%and 145.25%,respectively.【Conclusion】Adding application of sheep manure and humic acid can improve soil fertility saline alkali land,increase wheat yield,improve soil physical properties,increase soil enzyme activity and microbial total amount,and can be used as an effective means to improve saline-alkali soil in Lincheng County,Hebei Province.