辽南葡萄主产区土壤养分特征研究

Soil Nutrient Characteristics in Vineyards of Southern Liaoning

  • 摘要: 为了给辽南规模化葡萄园的养分管理和科学施肥提供依据,2016年在辽南葡萄主产区采集91个葡萄园土壤样品,分别测定土壤pH、有机质、全氮、碱解氮、速效磷和速效钾含量,对该葡萄主产区土壤养分状况进行研究。研究结果表明:辽南葡萄主产区土壤pH平均值为6.2;有机质平均含量为11.0 g kg−1,处于缺乏水平的样点占总样点的97.8%;土壤全氮、碱解氮平均含量分别为0.08 g kg−1和73.3 mg kg−1,处于缺乏水平的土壤样点分别占样本总数的85.8%和74.8%;土壤速效磷平均含量为70.4 mg kg−1,90.1%样点属于丰富水平,但变异系数较大;速效钾平均含量为158.0 mg kg−1,总体含量属于中等以上,处于中等以上和缺乏水平的样点占总样点的比例分别为68.2%和31.8%。不同地区、不同树龄和不同产量水平的葡萄园土壤养分状况存在较大差异;李官镇葡萄园养分状况好于许屯镇;随着种植年限的增加,葡萄园土壤pH、有机质、全氮、碱解氮、速效磷和速效钾含量均呈现显著升高趋势;不同产量葡萄园有机质、全氮、碱解氮和速效钾含量变化趋势为高产园 > 中产园 > 低产园。建议根据产量和树龄情况,分区域进行葡萄园养分管理,适当减少磷肥和钾肥、增加有机肥用量,以保证养分的高效利用。

     

    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.

     

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