Effects of microbial fertilizer combined with biochar on soil fertility and ryegrass growth
In order to explore the synergistic mechanism of microbial fertilizer combined with biochar on soil fertility and ryegrass growth,this study used Bangde 3 as the test material,and used pot methods to set up no fertilization control(CK)and treatments such as organic material(T1),biochar(T2),unsterilized microbial fertilizer(T3),sterilized micro-bial fertilizer(T4),biochar and microbial agent application(T5),biochar and microbial fertilizer application(T6).The effects of different treatments on soil organic matter content,available phosphorus content,available potassium content,and activities of catalase,urease,sucrase,alkaline phos-phatase,as well as ryegrass leaf nutrient content and yield were analyzed.The results showed that with the growth of ryegrass,the soil organic matter content,available phos-phorus content and available potassium content of different fertilization treatments increased first and then decreased.At different growth stages,the soil organic matter content,available phosphorus content and available potassium content of microbial fertilizer combined with biochar treatment(T6)were signifi-cantly higher than those of other treatments on the whole.When ryegrass was harvested,the activities of soil catalase,urease,sucrase and alkaline phosphatase in T6,T5 and T3 treatments were significantly higher than those in CK.Among them,T6 treatment increased the most significantly,and the activities of soil catalase,urease,sucrase and alkaline phosphatase were 230.91%,73.03%,24.00%and 238.28%higher than CK,respectively.The yield of ryegrass and the contents of total nitro-gen,total phosphorus and total potassium in leaves of T1-T6 treatments were significantly higher than those of CK.Among them,the increase of T6 treatment was the most significant,and the yield(fresh weight)and the contents of total nitrogen,total phosphorus and total potassium in leaves increased by 104.37%,81.70%,271.43%and 153.48%,respectively,com-pared with CK.Therefore,microbial fertilizer combined with biochar can effectively increase ryegrass yield and soil available nutrient content,increase soil fertility and promote ryegrass growth.This study provides a basis for the high-quality planting of ryegrass and the efficient utilization of microbial fertilizer.
万方数据
维普
