复合肥减量加钙对花生农艺性状、产量和品质的影响OA北大核心CSTPCD

In order to explore the fertilization rates for peanut in the eastern part of Hebei Province,the peanut variety Jihua 11 was used as test material and six treatments were set including 3 treatments of com-pound fertilizer(N-P2 O5-K2 O=17-17-17)reduction as zero reduction of conventional dosage(CK,1 500.0 kg/hm2 of compound fertilizer),12.5%reduction of conventional dosage(T1)and 25.0%reduction of con-ventional dosage(T2),and 3 treatments of compound fertilizer with calcium(calcium superphosphate,Ca≥15%)addition as CK+225.0 kg/hm2 calcium(T3),T1+337.5 kg/hm2 calcium(T4)and T2+450.0 kg/hm2 calcium(T5).The effects of compound fertilizer reduction and calcium addition on agronomic traits,yield and quality of peanut were studied.The results showed that the dry matter accumulation at maturity sta-ges,the dry matter allocation ratio to pods at podding stage and peanut yield in T4 treatment,and the pod dry matter accumulation at podding stage in T2 treatment were significantly higher than those in the other treat-ments.In the compound fertilizer reduction treatments,the peanut main stem height,branch length,dry mat-ter allocation ratio to pods at maturity stage,maximum dry matter accumulation rate(Vmax)and linoleic acid content in T2 treatment were significantly higher than those in CK and T1 treatment;the pod number per plant,pod dry matter accumulation at pod filling stage,maximum dry matter mass(K),100-pod weight and full-pod rate in T2 and T1 treatments were significantly higher than those of CK.Compared with compound fer-tilizer treatments,the corresponding treatments with calcium addition delayed the occurrence time of maximum dry matter accumulation rate(tmax)significantly,but had no significant effects on the O/L value and inoleic acid content;the pod number per plant,dry matter allocation ratio to pods at maturity stage,Vmax,100-pod weight and full-pod rate in T4 treatment were significantly higher than those in T1 treatment.The results of cor-relation analysis showed that the pod number per plant was extremely significantly positively correlated with 100-pod weight,full-pod rate and yield,and the branch number with pods was significantly positively correla-ted with 100-pod weight.The results of principal component analysis indicated that T4 and T2 ranked the first and second in terms of comprehensive principal component scores.To sum up,the peanuts in T2 treatment with 1 125.0 kg/hm2 of compound fertilizer or T4 treatment with 1 312.5 kg/hm2 of compound fertilizer+337.5 kg/hm2 of calcium superphosphate comprehensively performed better,which could be selected for pea-nut fertilization in eastern Hebei Province.