Ammonia loss from ryegrass pastures treated with urea based fertilisers. Murroon, Victoria, 2010 [Theme 1: Inhibitors for reducing emissions]

This data package describes a field trial conducted to assess the influence of urea applied with and without a urease inhibitors NBPT, and as a fine particle (FPA) or liquid application (UAN) on loss of the indirect greenhouse gas ammonia (NH3) from a ryegrass pasture (Lolium perenne L) in autumn and spring of 2010. The trial was designed to assess both fertlizer type and seasonal impacts on NH3 loss. Ammonia loss was measured on 50 m diameter circles using a passive ammonia sampling system where NH3 was trapped in centrally located acid traps. Data was collected on NH3 captured, soil mineral and urea N, plant biomass production and nitrogen content as well as local climatic conditions.

本数据集记述了一项2010年春秋两季开展的田间试验，旨在评估施用含与不含脲酶抑制剂（NBPT）的尿素，以及采用细颗粒（FPA）或液态施用（UAN）方式时，对多年生黑麦草（Lolium perenne L）牧场间接温室气体氨气（NH3）排放损失的影响。本试验同时针对肥料类型与季节因素对氨气（NH3）排放损失的影响开展评估。试验采用被动氨气采样系统，在直径50米的圆形样区内，通过设置于中心位置的酸性捕集阱捕获氨气（NH3）以测定其排放量。本数据集采集了捕获的氨气量、土壤矿质氮与尿素态氮含量、植物生物量与氮素含量，以及局地气候条件等相关数据。