生物有机液体混合肥对甜高粱根系形态特征的影响

为揭示生物液体有机混合肥对陕北农牧交错区青贮饲草作物根系形态特征的影响,通过盆栽控制试验,以甜高粱(Sorghum bicolor L.)为材料,设置不同浓度的生物活性水(BMW)(B1、B2、B3和B4)和Aidoora溶液(A1、A2和A3)处理,并测定甜高粱幼苗期的根系形态特征。结果表明:在大多数单一液体肥和混合液体肥下,甜高粱的根系生物量(RB)、根冠比(RSR)、根系体积(RV)、总根长(TRL)、根系表面积(RSA)、平均根直径(RAD)、比根长(SRL)和比根面积(SRA)均显著高于CK,表明BMW和Aidoora溶液有利于促进甜高粱苗期根系生物量积累和根系吸收能力;甜高粱的RB、TRL和RSA两两间均呈明显的正相关关系,表明根系表面积和总根长均随着根系生物量的升高而增加。综上分析表明,B3A2和B3A3相对于其他BMW和Aidoora混合液体肥,有利于促进甜高粱幼苗根系生物量积累和根系形态建成。

Effect of Mixed Organic Liquid Fertilizer on Root Morphological Characteristics of Sweet Sorghum

To clarify the effect of mixed organic liquid fertilizer on root morphological characteristics of forage crops in agro- pastoral ecotone of northern Shaanxi, sweet sorghum was used as the material in the pot experiment. Treatments with different concentrations of bacteria mineral water (BMW) (i.e. B1, B2, B3 and B4) and Aidoora solutions (i.e. A1, A2 and A3) were set, and the root morphological characteristics in the seedling stage of sweet sorghum were determined. The results showed that, under most single liquid fertilizer or mixed liquid fertilizer treatments, the root biomass (RB ), root shoot ratio (RSR ), root volume (RV ), total root length (TRL ), root surface area (RSA ), root average diameter (RAD ), specific root length (SRL ) and root area (SRA ) was higher than that of CK, which indicated that BMW and Aidoora solutions were favorable to improving the root biomass accumulation and absorbing capacity of root. Positive linear relationships existed amongRB ,TRL andRSA , which indicated that the total root length or root surface area increased with root biomass rising. These results suggested that, compared with other BMW and Aidoora solutions, B3A2 and B3A3 were the most suitable mixed organic liquid fertilizers to improve the root biomass accumulation and morphology formation in the seedlings of sweet sorghum.