Study on soil denitrification in an agricultural catchment in southeasten area of Fujian province [PDF]
, 2007 反硝化是一个重要的生物化学过程，是氮生物地球化学循环的重要环节。在维持流域、乃至全球氮素平衡方面发挥着重要作用。土壤反硝化的中间产物之一的N2O气体，是一种温室气体，对大气臭氧层具有较大的破坏作用。另外，反硝化还影响其他重要的生物地球化学过程。因此，反硝化研究具有重要的现实意义。 随着经济的高速发展、自然资源的不断消耗和生态环境的不断恶化，全球环境问题日益突出，温室效应已十分明显。作为温室气体之一的N2O对全球气候变化有着重要的影响。目前，有关N2O的研究已成为温室效应与全球气候变化研究的焦点之一 ...
徐玉裕
core
Studies on the rhzispheric microorganisms of Tsuga Longibracteata in different communities [PDF]
, 2005 Tsuga longibracteata is a kind of rare and immemorial plant listed as the protected tree in Fujian Province and is endemic to China. Tsuga longibracteata has good properties and it is also one important kind of potential timber tree and for restoration ...
向伟
core
Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
core +1 more source
Shuitu Baochi Xuebao目的为探究全球变暖背景下，放牧遗留效应对冻结期盐渍化草地土壤酶活性的影响。方法以河西走廊盐渍化草地为研究对象，设置对照（CK）、放牧（FCK）、增温（W）和增温+放牧（FW）4种处理方式，探究不同处理下土壤酶活性变化规律及空间分布特征。结果与CK相比，FCK处理显著提高土壤水分体积分数和全氮质量分数，降低土壤有机碳质量分数；W处理降低土壤水分体积分数，提高土壤有机碳和全氮的97.61%和16.89%；而FW处理均显著提高土壤水分体积分数、有机碳和全氮质量分数，全磷质量分数显著低于对照40.81 ...
孙佳星 +4 more
doaj
Shuitu Baochi Xuebao, 2003 通过研究比较不同植被类型下土壤中微生物区系、土壤酶活性和土壤生化作用强度,分析了贵州高原喀斯特环境退化演变过程中土壤质量的生物学特性变化过程。结果表明:随喀斯特环境退化程度加剧,土壤微生物总数下降,各主要生理类群数量呈下降趋势,土壤酶活性减弱,土壤生化作用强度降低,对环境反应敏感,可作为反映土壤质量的生物学指标。土壤微生物和酶活性是表征喀斯特环境退化演替过程中土壤质量的重要特征之一。
龙健 李娟 滕应 黄昌勇
doaj +2 more sources
Spatial relationship between root system and soil properties of mature and densely planted Kuerlexiangli pear under long-term strip fertilization [PDF]
[Objective] Kuerlexiangli pear (Pyrus sinkiangensis Yü et Lu.) is the main cultivar in Southern Xinjiang. In recent years, the main trunk dense planting pear orchard has developed rapidly and entered the peak fruiting period.
AN Shijie +9 more
core +1 more source
Relationship between Available State and Forms of Selenium and Zinc in Farmland Soil of Luoyang City and Its Influencing Factors [PDF]
The form and available state of elements are important indexes to evaluate the activity of elements. Research on the relationship between the available state and form of selenium (Se) and zinc (Zn) in farmland soil is an important basis for accurate land
Jianchuan ZHOU +5 more
core +1 more source
退化草地恢复生态对土壤物理性状的影响——以藏北公路沿线车辆碾压干扰矮嵩草草句为例
Shuitu Baochi Xuebao, 2006 通过对西藏那曲地区碾压干扰矮嵩草草甸群落不同恢复演替阶段土壤物理性状调查，分析不同演替阶段土壤颗粒组成、土壤容重和孔隙度，对其物理特性进行研究。结果表明：植被恢复有效改善了土壤的物理性质，提高了土壤对侵蚀动力的抵抗能力；退化草地恢复演替阶段与土壤物理性状变化具有明显的相关性联系，植被恢复与演替有效改善了土壤的物理性质，提高了土壤对侵蚀动力的抵抗能力。（1）碾压使土壤暴露，致使侵蚀作用加剧，松散、不黏结的砂粒和粉粒流失量较大，而粒径小于0．02mm和黏结性较强的粘粒流失量相对较少而表现出百分比相对增加 ...
杨颖慧 张锦华 杨春华
doaj
Shuitu Baochi Xuebao, 2006 分析研究了贵州乌江流域不同喀斯特生态系统的石灰土（岩性均腐土）土壤物理性质。结果表明：喀斯特生态系统（土壤利用方式和土壤侵蚀状况等）是影响土壤物理性质的主要因素。良好生态系统的土壤剖面发育良好，层次分异较明显，土层较深厚；土壤有机质含量较高；以粘壤土和粘土为主；土壤容重适宜，土壤孔隙性和结构性良好，土壤的抗蚀性和抗冲性强。退化生态系统（裸地）的土壤各种物理性状恶化，土壤的抗蚀性和抗冲性减弱。提出评价不同喀斯特生态系统的土壤抗蚀性的主要指标，并得出不同喀斯特生态系统的土壤抗蚀能力依次为：灌丛＋弱度侵蚀 ...
何腾兵 +9 more
doaj +2 more sources
Combined Effects of Humic Acid-Modified Magnetic Biochar and AMF on the Properties of Saline-Alkali Soil and Photosynthetic Parameters of Muskmelon [PDF]
[Objective] To improve humic acid-modified magnetic biochar (HA-MBC) and explore the combined effects of modified biochar and arbuscular mycorrhizal fungi (AMF) on the properties of saline-alkali soils and the growth of muskmelon.
CHEN Xinyan +12 more
core +1 more source