Results 61 to 70 of about 5,216 (161)
STUDIES ON THE NUTRIENT RETRANSLOCATION EFFICIENCIES DURING LEAF SENESCENCE [PDF]
, 1999 国家自然科学基金!资助课题(No ...
林鹏, 王文卿
core
Shuitu Baochi Xuebao, 2020 云南山地面积约占全省土地总面积的94%，特殊的地形特征，极易引发坡面土壤侵蚀和养分流失，严重影响了农业可持续生产。采取有效的农艺措施来减少坡耕地土壤养分流失是十分有必要的。为此，通过4年定位试验对顺坡（2组处理）、横坡（2组处理）2种耕作方向的复合农艺措施处理进行研究。结果表明：云南坡地红壤的径流时间主要集中在6—9月，且产流雨量占年降雨量的65.62%~75.82%。产流雨量与年降雨量呈现一致趋势。径流量和产流雨量呈线性关系（RNVF2=0.597 7，ROVF2=0.415 1，ROHF2=0 ...
毛妍婷 +8 more
doaj
, 2016 2015年中央一号文件指出,要主动适应经济发展新常态,在优化农业结构上开辟新途径,在转变农业发展方式上寻求新突破,在促进农民增收上获得新成效。从大城市的实际情况出发,加快都市现代农业的发展步伐,是实现上述发展目标的重要途径。都市现代农业的发展空间是无限的"都市农业 ...
许经勇
core
Research and Application of Fujian Green GDP Accounting [PDF]
, 2011 通过构建虚拟治理成本、水土流失和森林资源生态价值核算模型,对传统gdP进行调整,结果表明,福建省2009年绿色gdP为13041.56亿元,其中核算出的环境损失(污染虚拟治理成本)占绿色gdP的0.08%,2010年的经济增长中仅有0.08%是以牺牲自身环境资源取得,可见福建省对环境污染的治理水平较高,水土流失损失价值占绿色gdP的0.58%高于环境污染占绿色gdP的比值,福建省还需加大对水土流失的治理力度。森林资源生态效益的总价值使传统的gdP增长了6.58%,占绿色gdP的6.83 ...
许秀真, 颜双波
core
Effects of Chemical Fertilizer Reduction Combined with Straw and Organic Fertilizer Application on Soil Acidification Mitigation and Erosion Control [PDF]
[Objective] To demonstrate that appropriate application of straw and organic fertilizer can effectively improve soil quality, have a positive effect on soil acidification mitigation and erosion control.
CAO Yunfei +9 more
core +1 more source
Research Progress on Utilization of Arundo Donax L. Combustion [PDF]
ObjectivesArundo donax L., as a high-yield energy crop suitable for intensive cultivation, shows great potential for large-scale replacement of coal in power generation and CO2 emission reduction. Under China’s “dual-carbon” goals and the requirements of
WANG Yicai, YU Dunxi, YU Xin
core +1 more source
Shuitu Baochi Xuebao, 2004 对紫色土坡地6种种植模式下的径流泥沙与养分流失进行了观测统计分析,结果表明,6种种植模式下的径流量、泥沙流失量及养分流失量存在显著的差异,南方早熟梨 紫花苜蓿及柑橘 鸭茅两种果草模式与其它种植模式相比其径流过程曲线较为平滑,无突显的径流峰值点,径流量最少,两种果草模式各项养分流失量与传统顺坡种植模式相比减少了4～7倍不等;流失泥沙中的养份含量高于背景土壤和溶蚀携带,具有富集养分的特征,其富集比大多在1.3～2.4之间。
蒋光毅 史东梅 卢喜平 刘玉民
doaj
Shuitu Baochi Xuebao, 2021 为探明紫色土坡耕地不同绿肥覆盖对柑橘园径流和养分流失的阻控效应，在田间径流小区设置黑麦草（Lolium perenne L.）、光叶苕子（Vicia villosa Roth var.）、二月兰（Orychophragmus violaceus）和清耕对照4个处理，定量监测了在自然降雨条件下不同处理的径流及氮磷养分流失量。结果表明，与清耕对照相比，周年内绿肥覆盖可显著降低8.7%~27.0%的地表径流量、30.1%~50.6%总氮流失量和32.4%~62.9%总磷流失量 ...
刘瑞 +7 more
doaj
Effects of Different Logging Residue Treatments on Acid Hydrolyzed Soil Organic Carbon Fractions and Soil Microbial Communities in a Chinese Fir Plantation [PDF]
[Objective] Acid hydrolyzed soil organic carbon fractions are important in soil, and the changes of their contents will affect soil microbial community composition.
GUO Jianfen +5 more
core +1 more source
Strategies of high efficiency water usage promoted by microbial remediation in coal mining areas of western China [PDF]
The fragile ecological environment in the western coal mining areas of China, compounded by intensive mining activities, has led to water and soil erosion, soil degradation, and damaged root systems.
Chao WU +4 more
core +1 more source