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以不同含氮量复合肥和蓝莓钵苗为试材,研究其不同施用量以及施肥后不同时期对蓝莓钵苗土壤性质的变化的影响,同时测定植株生长状况以及叶片氮含量,为蓝莓合理施肥提供参考依据。结果表明:不同用量的复合肥短期内对土壤pH值影响不大,土壤电导率值和碱解氮含量随肥料施用量增大而增高,增高到一定程度,蓝莓出现死苗。电导率值与碱解氮含量达到最大的时期并不一致。0.2g/株处理是蓝莓苗生长最适施肥量,此时植株生长最适的电导率值低于1 000μS/cm,碱解氮含量在100~150mg/kg。叶片氮含量随肥料施用量增大而升高,与土壤碱解氮含量成正比。
Taking different nitrogenous fertilizer and blueberry seedlings as test materials, the effects of different application rates and different periods after fertilization on the changes of soil properties of blueberry seedlings were studied. The growth status of plants and the nitrogen content of leaves were also measured. Provide a reference basis. The results showed that different concentrations of compound fertilizer had little effect on soil pH value in short term. Soil electrical conductivity value and content of alkaline hydrolysis nitrogen increased with the increase of fertilizer application, increased to a certain extent, blueberry appeared dead seedlings. Conductivity and alkali hydrolysis of nitrogen content reached the maximum period is not the same. 0.2g / plant treatment is the optimum amount of fertilizer for the growth of blueberry seedlings, when the optimum plant growth conductivity of less than 1 000μS / cm, alkaline hydrolysis of nitrogen content of 100 ~ 150mg / kg. The leaf nitrogen content increased with the increase of fertilizer application, and it was directly proportional to the content of alkaline soil nitrogen.