微量元素Mo对宝坻大蒜生长的影响研究

对宝坻大蒜基地土壤Mo丰缺状况进行了调查评价,并计算了Mo的输入输出净通量。结果表明,宝坻大蒜基地土壤有效Mo一般在0.05～0.17mg·kg-1,种植大蒜每季从化肥输入的Mo为1538.72mg·hm-2,从灌溉水输入的Mo通量为6750mg·hm-2,大蒜每季从耕植层带出的Mo量为7270mg·hm-2。宝坻大蒜基地90%以上土壤缺Mo,大蒜是对缺Mo敏感性强的农作物,从化肥和灌溉水这两种方式输入的Mo只能满足大蒜需求60%左右,必须要有其他Mo源才能满足大蒜正常生长需要。常用的钼肥有钼酸铵和钼酸钠,施Mo量一般只有14～140g·hm-2。采用叶面喷施或播前进行种子处理方法可以有效解决大蒜基地缺Mo问题。

Effect of Mo on the Growth of Baodi Garlic

This article assessmented the soil in the Baodi garlic base,and counted the Mo net amount input and output.The results showed the soil available Mo content was 0.05～0.17 mg·kg-1.The Input Amount of Mo from Fertilization was 1 538.72 mg·hm-2 in the Baodi garlic base,the input amount of Mo from irrigation was 6 750 mg·hm-2,output amount from garlic was 7 270 mg·hm-2.The investigation shows that in the Baodi garlic base,the soil available Mo content was under the critical level in more than 90% area.Garlic was high sensitivity with Mo deficiency.Now only 60% Mo demand of garlic could be provided by fertilization and irrigation,and other Mo sources was wanted to satisfy the garlic normally growth need.The commonly used molybdate fertilizer were Sodium molybdate and Ammonium molybdate and the fertilizer rate was only 14～140 g·hm-2.Spraying on leaves and seed-treatment could be used to solve the molybdate deficiency of the garlic base effectively.