缓释尿素对大蒜生长及土壤有效氮的影响

Effect of Controlled-Release Urea on Garlic Growth and Soil Available Nitrogen

采用田间小区试验,研究了缓释尿素对大蒜生长、产量及土壤有效氮的影响。结果表明:缓释尿素对大蒜的生长发育、产量及土壤有效氮均有明显的影响。大蒜前期株高、叶片数均以尿素处理(T1)最高,其次为尿素+缓释剂处理(T2),尿素+缓释剂+包膜处理(T3)最低。蒜头的直径和单株蒜重表现为T3最优,其次为T2,T1(对照)最低。大蒜产量表现为T3最高,666.7m2为1 166.6 kg,较对照增加35.1%;其次是T2,较对照增加28.8%。两种缓释尿素都能明显增加土壤有效氮的含量。

The plot experiment was conducted to study the effect of controlled - release urea on growth and yield of garlic and soil available nitrogen. The results showed that the controlled - release urea influenced the garlic growth and development, yield and soil available nitrogen obviously. The plant height and leaf num- ber of garlic in early period were the highest under the T1 treatment （ only urea）, followed by T2 （ controlled - release urea） and T3 （ coated controlled - release urea）. The diameter of garlic bulb and bulb weight per sin- gle plant performed the best under T3 treatment, followed by T2 and T~. The garlic yield of T3 treatment was the highest as 1 166.6 kg per 666.7m2, which increased by 35.1% compared to that of the control; the garlic yield of T2 treatment was the second as 1 112.1 kg per 666.7m2, increasing by 28.8% compared to that of the control. The controlled - release urea could significantly increase the content of soil available nitrogen.