Study of Limiting Nutrient Elements to Peanut in Jiaodong Peninsula in Shandong Province

Through field experiments,limiting nutrient elements to peanut were studied at Jiaodong Peninsula in Shandong Province.The results showed that zinc and magnesium were the main limiting factors to peanut yield,besides nitrogen,phosphorus and potassium,in Jiaodong areas.Excessive nitrogen or imbalanced fertilization ratio of nitrogen,phosphorus and potassium could reduce peanut yield.Fertilization affected peanut yield mainly through impacting on 100-pod weight,total pod quantity,single/double full pod number and unfulfilled pod number per cluster.Potassium content in stems and leaves of the treatments with no potassium applied(CK and OPT-K) was significantly lower than that of other treatments.