Effects of straw biochar on soil microbes and physicochemical properties and pak-choi growth of greenhouse
In order to investigate the effects of straw biochar on protected soil microbes and physicochemical properties and pak-choi yield and quality,greenhouse culture of pak-choi was conducted under 6 soil treatments:conventional fertilizer application(CK),CK + 4 t/hm2 biochar (T1),CK + 8 t/hm2 biochar(T2),CK + 12 t/hm2 biochar(T3),CK + 16 t/hm2 biochar(T4),and CK + 32 t/hm2 biochar (T5).The results showed that biochar could improve the quantities of soil bacteria,fungi and actinomyces,the quantities of soil bacteria and actinomyces positively correlated to biochar application rate,the treatment T5 was the best,and the treatment T3 was the maximum in quantity of fungi;The treatment T2 was the highest in readily available nutrient contents of soil and made the readily available nitrogen,readily available phosphorus and readily available potassium increase respectively by 18.4％,27.8％ and 23.0％ over CK;In the treatment T3 the vitamin C content of pakchoi was the highest,reaching 13.2 mg/100 g,in the treatment T2 the soluble sugar content of pak-choi was the highest,being 1.46％,and both were respectively 42％ and 31％ higher than those in CK;In the treatment T3 the pak-choi yield was the highest and increased by 18.5％ over that in CK.The above results indicated that applying biochar at 8-12 t/hm2 could significantly improve the pak-choi yield and quality in greenhouse culture.
国家科技期刊平台
NSTL
万方数据
维普
