Quantification of soil biopore density after perennial fodder cropping
Quantification of soil biopore density after perennial fodder cropping
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DOI：
10.1007/s11104-015-2488-3
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发表时间：
2015-09-01
期刊：
影响因子：
4.9
通讯作者：
Koepke, Ulrich
中科院分区：
文献类型：
--
作者：
Han, Eusun;Kautz, Timo;Koepke, Ulrich
植物根部性状影响土壤生物孔（BP）的形成。本研究的目的是测量具有对比根系性状和种植持续时间的饲料作物品种对 BP 密度 (BPD) 的影响，并解决不同年份这些影响的一致性，重点关注根腐烂的影响。在种植三种具有对比根系的多年生饲料作物品种（即紫花苜蓿 (Medicago sativa L.)、菊苣 (Cichorium intybus L.) 和高羊茅）后，对土壤 BPD 进行了量化(Festuca arundinacea Schreb.) 在 2007 年至 2014 年两次重复田间试验中休耕 1 年、2 年和 3 年，休耕 2 年。直根饲料作物的总 BPD (421 +/- 14 m(-1)) 明显高于须根作物 (337 +/- 12 m(-1))。耕作期限不影响土壤 BPD。平均而言，休耕 2 年后，中型 BP（BPmed；2-5 mm）的密度增加了 14%，而休耕后粗型 BP（BPcor；> 5 mm）的 BPD 降低了 5%。直根饲料作物促进了 BP 在底土中的形成。准确评估生物孔（BP）及其持久性必须考虑时间动态，包括根腐烂的影响。
Plant root traits affect soil biopore (BP) formation. Aims of this study were to measure the effects of fodder crop species with contrasting root traits and duration of cropping on BP density (BPD), and also to address the consistency of these effects over different years focusing on the effects of root decay.Soil BPD was quantified after growing three perennial fodder crop species with contrasting root systems, namely, lucerne (Medicago sativa L.), chicory (Cichorium intybus L.) and tall fescue (Festuca arundinacea Schreb.) for 1, 2, and 3 years with 2 years fallow in two repeated field trials from 2007 to 2014.Total BPD after taprooted fodder crops (421 +/- 14 m(-1)) was significantly higher compared with fibrous-rooted crops (337 +/- 12 m(-1)). Cropping duration did not affect soil BPD. On average, density of medium-sized BP (BPmed; 2-5 mm) increased 14 % after 2 years of fallow, whereas BPD decreased by 5 % for coarse-sized BP (BPcor; > 5 mm) after the fallow.Taprooted fodder crops enhanced BP formation into subsoil. Accurate assessment of biopores (BPs) and their persistence must take account of the temporal dynamics, including effects of root decay.