Effect of Different Acid Modification Measures on Soil pH and Main Nutrients in Carya cathayensis Forest Land
In order to clarify the effect of different acid improvement measures on the soil pH and available nutrients in Carya cathayensis forests,the three-factor three-level field experiment was used to study the effects of the types and application rates of the improved materials on the acidified soil pH and main nutrients.The results showed that the pH,alkali-hydrolyzable nitrogen,available phosphorus and rapidly available potassium content after acid improvement in Carya cathayensis forest land increased by 18.3%-51.63%,17.91%-53.26%,243.01%-466.56%and 81.56%-203.14.The order of factors affecting soil pH and alkali-hydrolyzable nitrogen content is lime>fulvic acid potassium>calcium magnesium phosphate,the order of factors affecting soil available phosphorus content is calcium magnesium phosphate>lime>fulvic acid potassium,and the order of factors affecting soil rapidly available potassium content is fulvic acid potassium>calcium magnesium phosphate>lime.Comprehensive analysis of the effect of application,the application of lime 7.5 kg/plant + calcium-magnesium phosphate 4 kg/plant + fulvic acid potassium 8 kg/plant in acidified Carya cathayensis forest land has a better improvement effect.
万方数据
维普
