滴灌沼液对茶园土壤-茶树氮磷含量影响研究

茶园滴灌沼液,不仅可以将沼液进行生态处理,避免其造成二次污染,而且可以充分利用沼液中营养成分,提高茶园效益。实验表明,适时滴灌沼液可以保持土壤中铵态氮含量,有利于提高茶叶产量;可以改善土壤结构,增强土壤微生物活性,使滴灌区土壤中有效磷含量升高,滴灌可以提高氮磷的利用率。与非滴灌区相比,滴灌系统水肥耦合较好,更利于茶树吸收利用养分。就产茶中氮磷含量作为茶树对氮磷的吸收量而言,与非滴灌区相比,滴灌区茶树对氮磷的吸收利用率分别提高了18.12%、8.33%。

The Influence of Nitrogen and Phosphorus Contents of Soil and Tea in Tea Garden Under Drip Irrigation Condition

Dripping irrigation biogas slurry in tea garden,not only will avoid the biogas slurry pollution caused by two times because it is a ecological treatment,and can make full use of biogas liquid nutrients.That can improve the benefit of tea garden.Experiments show that,timely dripping irrigation biogas slurry can keep soil ammonium nitrogen.It also can improve soil structure,and increase soil microbial activity,and then make the drip irrigation area soil effective phosphorus content increased.Dripping irrigation can improve the utilization ratio of nitrogen and phosphorus.Dripping irrigation system makes water and fertilizer coupling better,and more conducive to the absorption and utilization of nutrient.The utilization ratio of the tea in the irrigation district on absorption of nitrogen and phosphorus were increased by 18.12%,8.33%.