Huang YunXiang

Effect of different fertilization treatments on yield and nutrients uptake of Chinese cabbage and cabbage

A field plot experiment was conducted to study effect of different fertilization treatments on yield,nutrients uptake and nutrients use efficiency of Chinese cabbage and cabbage.The results showed that:yield of cabbage and Chinese cabbage of the application of manure,oil cake and special fertilizer for vegetables combined with fertilizer is higher than that of the pure chemical fertilizer treatment.The yield of application of special fertilizer for vegetables combined with fertilizer of Chinese cabbage is the highest,yield of it enhanced 25.30% compared with the pure chemical fertilizer treatment;application of oil cake and special fertilizer for vegetables combined with fertilizer are of the highest N and P nutrient use efficiency,N and P nutrient use efficiency of them enhanced 21.65%,10.77% compared with the pure chemical fertilizer treatment,respectively.The yield of application of oil cake combined with fertilizer of cabbage is higher,yield of it enhanced 9.90% compared with the pure chemical fertilizer treatment;application of oil cake combined with fertilizer is of the highest N and P nutrient use efficiency,N and P nutrient use efficiency of it enhanced 29.23% and 14.9% compared with the pure chemical fertilizer treatment,respectively.

Inorganic nitrogen fractions and profile distribution characteristic in vegetable soil derived from river alluvial in Dongting Lake plain

By means of both field investigation samples and indoor analysis,The inorganic nitrogen fractions and profile distribution characteristic in vegetable soil derived from river alluvial in dongting lake plain were researched.The result indicated that the content of total nitrogen varies from 0.65~1.67 g/kg,the average value and coefficient of variation is respectively 1.25 g/kg and 15.54%.The average value of fixed ammonium is 290 mg/kg,accounting for 23.2% of total nitrogen.The content of NO3--N and NH4+-N is respectively 46.00 mg/kg and 1.91 mg/kg.The content of total N,NH4+-N,and fixed ammonium decreased with the increasing of soil profile depth in 0~80 cm.NO3--N display leaching phenomenon from surface soil to subsoil.