晉北農(nóng)牧交錯帶養(yǎng)分添加和淺耕翻對草地生物量的影響
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中圖分類號：S812.4 文獻標識碼：A 文章編號：1007-0435（2025）04-1299-09
Abstract：Four treatments，including control，nutrient addition（nitrogen，phosphorus，potassium），shallow tillage （ ）and nutrient addition + shallow tillage，were set up to investigate the effects of different grassland management measures on grassland biomass in the agro-pastoral ecotone of norther Shanxi. The results showed that the above-ground，below-ground，and total biomass increased by 6 8 . 3 2 % ， 2 5 . 7 8 % and 4 1 . 0 4 % ，respectively，under the nutrient addition treatment，while the biomass of all levels decreased by 58 % ， 2 5 . 7 8 % and 4 1 . 0 4 % ，respectively，under the shallow tillage treatment. Nutrient addition + shallow ploughing treatment had no significant effect on biomass，but root-crown ratio increased by 7 6 . 9 6 % .Nutrient addition increased the proportion of perennial biomass； shallow ploughing and nutrient addition + shallow ploughing decreased the proportion of litter biomass and increased the proportion of annual and biennial bio mass.In2O22 with higher precipitation，root-shoot ratio，below-ground biomassand total biomass were signifi cantly higher than those in 2O2l with lower precipitation，emphasizing the important role of interannual precipitationinregulating plant biomass alocation andaccumulation. In conclusion，compared to short-term shallow ploughing management practices， nutrient addition was more beneficial to the grassland productivity improvement grassland in the agro-pastoral ecotone of northern Shanxi.
Key words：Nutrient addition； Shallow ploughing；Agro-pastoral ecotone ； Precipitation； Biomass
中國北方的農(nóng)牧過渡帶連接著東西兩側(cè)的牧區(qū)和農(nóng)區(qū)，是歐亞大陸典型的生態(tài)過渡帶[1]。（剩余13950字）