Effects of Formula Fertilization and Fertilization Methods on Growth and Woodland Soil of Carya illinoensis
The aim is to explore the influence of different formula fertilization and fertilization techniques on leaf mineral nutrients,soil enzyme activity,soil effective nutrient content and fruit quality of Carya illinoensis.Five treatments for different formula fertilization tests,namely OPT(Nutrient experts systematically recommend fertilization),OPT-N(No nitrogen fertilizer),OPT-P(No phosphorus fertilizer),OPT-K(No potassium fertilizer)and CK(No fertilizer),respectively;five treatments were designed for different fertilization techniques,according to time,frequency and proportion and fertilization method.Mineral nutrient,soil enzyme activity,effective nutrient content,oil content and fatty acid content were determined in different periods.Different formula fertilization significantly changed the soil enzyme activity,soil effective nutrient content,plant leaf mineral nutrient content and fruit quality,among which the OPT-P and OPT-K treatments had higher soil nutrient absorption and utilization efficiency.Soil phosphatase and urease activities were higher in OPT-P,sucrase was higher in OPT,and catalase was higher in OPT-N.The oil content of OPT-P fruit kernels was significantly increased by 8.23 percentage points over the CK treatment,and there was no significant difference in unsaturated fatty acid content among the treatments.The soil effective N,P,K content and organic matter content with different fertilization techniques were significantly lower than the control treatment,and fertilizing 70%in early March and 30%in early June could improve the leaf nutrient content of N,P,and K,soil sucrase and catalase activities,the oil rate of fruit kernels was 7.38 percentage points higher than the control.In summary,OPT-P formula fertilization and twice from the shallow to the deep radial ditch can promote the soil nutrients and increase the oil content of fruit kernels.
万方数据
维普
