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本文对48个不同产量金丝小枣园的叶片和土壤氮、磷、钾含量进行了分析测定。结果表明,产量高低与叶片含氮量成正相关.初步确定出金丝小枣氨素营养诊断指标,即叶片含氮量低于2.30%时为缺乏, 2.62%时为潜在缺乏, 2.80%左右时为适量.叶片氮、磷和钾的适量范围(%)分别为2.79±0.17、0.160±0.016和1.79±0.29。在三类园中,土壤全氮、水解氮、速效磷和速效钾含量均随土层深度增加而降低.相同土层,从低产到高产园,全氮和速效磷呈增加趋势。
In this paper, the contents of nitrogen, phosphorus and potassium in 48 jujube orchards with different yield were analyzed and determined. The results showed that the yield and nitrogen content of leaves were positively correlated. Preliminary determination of gold wire jujube ammonia nutrition diagnostic indicators, that is, when the leaf nitrogen content is less than 2.30% for the lack of 2.62% for the potential lack of 2.80% for the right amount. The appropriate range (%) of leaf N, P and K was 2.79 ± 0.17, 0.160 ± 0.016 and 1.79 ± 0.29, respectively. Soil nitrogen, hydrolyzed nitrogen, available phosphorus and available potassium decreased with the depth of soil in three types of gardens. The same soil layer, from low to high yield garden, total nitrogen and available phosphorus showed an increasing trend.