控释掺混肥对大蒜鳞茎产量、品质和氮素利用率的影响

以苍山蒜和金乡蒜为试材，通过大田试验研究了控释掺混肥一次性基施对大蒜鳞茎产量、品质和氮素利用率的影响。结果表明：与普通肥相比，等量和80%用量控释掺混肥能使苍山蒜和金乡鳞茎产量分别提高5.0%～12.5%、15%～15.8%、可溶性糖含量分别增加3.5%～27.6%、15.1%～30.0%，SOD比活力提高48.1%～93.2%、61.0%～68.4%，干物质含量分别提高12.5%～20.5%、31.8%～37.2%，氮素利用率分别提高86.4%～87.0%、146.0%～171.5%，差异达极显著或显著水平，增产节肥效果明显。但控释掺混肥用量降至60%时不利于上述指标的提高。施用控释掺混肥可提高VC含量，但效果不明显。大蒜素含量随鳞茎产量增加有下降的趋势，为了不降低大蒜鳞茎的品质，施用控释掺混肥时应配施一定量硫。

Effects of Controlled-releasing Bulk Blending Fertilizer Application on Garlic Yield,Quality and Nitrogen Utilization Efficiency

A field-trail experiment was carried out to investigate the effects of single basal application of controlled-releasing bulk blending fertilizer(CRF) on yield、quality and nitrogen utilization efficiency of two garlic cultivars:‘Cangshansuan’ and ‘Jinxiangsuan’. Results showed that compared to CCF, 100% and 80% CRF treatments could increase bulb yield、bulb soluble sugar content and SOD activity significantly by 5.0%-12.5% and 15.0%-15.8%, 3.5%-27.6% and 15.1%-30.0%, 48.1%-93.2% and 61.0%-68.4% for each cultivar, respectively. What was more, 12.5%-20.5% and 31.8%-37.3%, 86.4%-87.0% and 146.0%-171.5% higher plant dry matter yield and nitrogen utilization efficiency were also observed in these two specific treatments. However, 60% CRF application showed no promoting effect on the factors mentioned above. Difference of VC content between CRF and CCF treatments was no significant. Allicin content exhibited a negatively correlation with bulb yield. In order to ensure garlic flavor and quality, an extra S input should be performed together with CRF.