Sensitivity of total, light fraction and mineralizable organic matter to management practices in a Lethbridge soil
Sensitivity of total, light fraction and mineralizable organic matter to management practices in a Lethbridge soil
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DOI：
10.4141/cjss94-020
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发表时间：
1994-05
影响因子：
1.7
通讯作者：
E. Bremer;H. Janzen;A. Johnston
中科院分区：
文献类型：
--
作者：
E. Bremer;H. Janzen;A. Johnston
作物管理影响农业土壤中有机质的数量和质量。1951年在阿尔伯塔莱斯布里奇进行的一项轮作研究于1992年9月取样，以确定作物管理对总有机质、轻有机质和可矿化有机质（10周）含量的影响。春小麦是主要的种植制度，检查的治疗方法包括休耕频率，饲料干草生产旋转，粪肥修正案，氮肥的应用，和本地草。后两种治疗方法于1985年引入。总有机质和轻馏分之间没有变化的旋转阶段，而矿化C往往是最低的休耕阶段期间和不久后。当平均跨旋转阶段，总，轻馏分，和矿化有机质的提高，减少休耕频率，粪肥additons，干草生产和本地草。土壤总有机质和活性有机质含量在0 ~ 7.5cm土层中的最高浓度一般都出现在表层土壤中。
Crop management influences the quantity and quality of organic matter in agricultural soils. A crop rotation study established at Lethbridge, Alberta in 1951 was sampled in September 1992 to determine the effect of crop management on total, light fraction and mineralizable (10-wk) organic matter contents. Spring wheat was the dominant cropping system; treatments examined include fallow frequency, forage hay production in rotation, manure amendment, N fertilizer application, and native grass. The two latter treatments were introduced in 1985. Total and light fraction organic matter did not vary among phases of the rotation whereas mineralized C tended to be lowest during and shortly after a fallow phase. When averaged across rotation phases, total, light fraction, and mineralized organic matter were enhanced by reduced fallow frequency, manure additons, hay production and native grass. Highest concentrations of total and labile organic concentrations in the 0- to 7.5-cm soil depth were generally found in t...