Abstract:
Soil nutrient characteristics of the main grape production area in southern Liaoning were investigated by measuring the properties of soil pH, organic matter, total N, available N, available P and available K, based on 91 soil samples that were collected from the vineyards in 2016. The results showed that the average soil pH value was 6.2 in the main grape production areas, the average soil organic matter content was 11.0 g kg with a sample proportion of the deficient level to the total up to 97.8%. The average contents of total N and available N were 0.08 g kg
−1 and 73.3 mg kg
−1 respectively, and the sample proportions of them at the deficiency level was 85.8% and 74.8% respectively, compared to the total sample number. The average available P content was 70.4 mg kg
−1 with a sample proportion up to 90.1% that reached rich level. Moreover, the available K contents of most soils were above the medium level with an average content of 158.0 mg kg
−1. Additionally, the contents of pH, organic matter, total N, available N, available P and available K in the vineyard soils were increased significantly with the increase of planting years, and those in the vineyards with different yields were presented a trend of high yield vineyards > middle yield vineyards > low yield vineyards. Considering the yield and planting age, the grape nutrient management in different regions should reduce the applications of P and K fertilizers but increase the amount of organic fertilizer, in order to ensure the efficient use of nutrients.