Minerals on agricultural land (soil balances) 1990-2014

In this table you will find figures over surplus minerals nitrogen, phosphorus and potassium on agricultural land based on soil balances. In these balances, the supply to the soil (from animal manure, fertiliser and other sources, but also by precipitation (deposition)) is settled with the drain (via the crop yield) to calculate the surplus. Part of these surpluses enter the ground and surface water through emissions from agriculture (floating of ditches, discharges into the spout and drainage water from greenhouse horticulture, and yardwashing) and through drainage from agricultural land. In addition, nitrogen evaporation occurs, causing nitrogen to disappear into the air. In addition to ammonia (NH3) volatility from animal manure, fertilisers and in the preservation of crops (cut maize and grass), nitrogen also volatiles in the form of other compounds (nitrogen oxide (N2O), nitrogen gas (N2) and nitrogen oxides (NOx)) in the storage of manure in stables and manure deposits. In the soil there is also conversion of nitrate (NO3) by bacteria, causing nitrogen in the form of the harmless nitrogen gas (N2) or the greenhouse gas (N2O) to escape to the air (denitrification). Only part of these nitrogen losses to the air ends up in the form of precipitation on agricultural land (return flow). What eventually accumulates in the soil (accumulation) is therefore smaller than the calculated surplus. Data available from 1990 to 2014. Status of the figures: The data for 2014 is provisional. As this table has been discontinued, the data will no longer be definitive. Changes as of 1 July 2016: None, this table has been discontinued. This table is followed by mineral balance of agriculture, see paragraph 3. When are new figures coming? No longer applicable.本表格收录了基于土壤养分收支核算的农业用地氮、磷、钾矿质剩余量相关数据。此类核算中，将土壤的养分输入量（来自动物粪便、化肥及其他来源，同时涵盖大气沉降）与养分输出量（通过作物收获移除）相抵，以此计算养分剩余量。 部分此类剩余养分将通过农业源排放（包括沟渠溢流、排入排水口与温室园艺的排水、场地冲洗水）以及农业用地的径流渗漏，进入地下水与地表水。 此外还存在氮素挥发过程，使氮素逸散至大气。除动物粪便、化肥以及青贮玉米与牧草处理环节的氨（NH₃）挥发外，在畜舍与粪便存储场地中，氮素还会以其他化合物形式挥发，包括一氧化二氮（N₂O）、氮气（N₂）与氮氧化物（NOₓ）。土壤中还会发生细菌介导的硝酸盐（NO₃⁻）转化过程，使氮素以无害氮气（N₂）或温室气体一氧化二氮（N₂O）的形式逸散至大气（即反硝化作用）。上述氮素向大气的流失中，仅有一部分会以大气沉降的形式重新回到农业用地（即回流）。因此最终留存于土壤中的氮素累积量，会低于计算得到的养分剩余量。 本次数据覆盖1990年至2014年。 数据状态说明：2014年的数据为暂定数据。由于本表格已停止更新，相关数据将不再发布最终正式版本。 2016年7月1日起的变更说明：无相关变更，本表格已停止更新。本表格后续衔接农业矿质养分收支表，详见第3段。 新数据发布时间：不再适用。