摘要:
通过2年田间小区试验研究不同用量长效复合肥添加剂(NAM)在茶树上的应用效果。结果表明,随添加剂用量的增加,土壤中铵态氮含量逐渐升高,硝态氮含量逐渐降低,表明添加剂能减慢铵态氮向硝态氮的转化。随添加剂(NAM)用量的增加,茶青产量先增加后降低,以添加7.5NAM处理的茶青产量和百芽重最高,2010年和2009年茶青产量分别比对照增产5.20%和2.64%。2010年茶青产量、芽头密度和百芽重增长率高于2009年,土壤中铵态氮和硝态氮含量也普遍高于2009年。可见,NAM具有抑制尿素的水解和铵态氮硝化的作用,能够节省劳动力,具有延长肥效的效果。
Abstract:
A 2-year field experiment was conducted to study the effect of the long-term compound additives (NAM) in varying quantities on the tea trees. The results showed that increased NAM caused gradual increase on NH4+-N and reduction on NO3--N. The additive slowed down the conversion of NH4+-N to NO3--N. With the additon of NAM, tea yield was increased initially, and then, decreased. Both yield and hundred-bud-weight of green tea peaked when 75% NAM was applied. The yield was more than 5.20% in 2010, and 2.64% in 2009, as compared to the control. The increasing rates on tea yield, bud density and hundred-bud-weight were higher in 2010 than 2009. And, the NH4+-N and NO3--N contents in the soil were also higher in 2010 than 2009. Thus, it was concluded that NAM application could inhibit urea hydrolysis and ammonium nitrification resulting in savings on labor fertilizer.
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