论文部分内容阅读
Soil Organic Carbon Stocks as Affected by Tillage Systems in a Double-Cropped Rice Field
【机 构】
：
College of Agronomy and Biotechnology,Key Laboratory of Farming System,Soil and Fertilizer Institute
【出 处】
：
土壤圈（英文版）
【发表日期】
：
2004年期
【基金项目】
：
the Special Fund for Agro-Scientific Research in the Public Interest of China
其他文献
Stability condition and quality evaluation formula of layerlike backfilling roof, Q≥C, where Q denotes is quality index depending on allowable compressive or t
房产测绘是常规的测绘技术与房产管理业务相结合的专业测绘.而房产测量所获得与标志相联系的房产权属界址、房屋面积、房屋产别等等都具有法律效力,从而载入房屋权属证书,所
Based on the turbulence jet model, with respect to Ar-He mixture plasma gas injecting to ambient atmosphere, the temperature filed and velocity field under typi
Compared with conventional method of violet spectrum,determination of the content of sulfides in fluid catalytic cracking(FCC)gasoline by using the potentiometr
分别在酸性和碱性介质研究了铬天青S(CAS),溴甲酚绿(BCG),溴邻苯三酚红(BPR)和甲基百里酚蓝(MTB)与蛋白质结合的光度性质.在pH 3.8～4.0,蛋白质使CAS和BCG的吸光度降低,在pH 3.
Microwave digestion polarography for determining seven trace elements in Salvia Miltiorrhiza Root an
The sensitive second derivative waves of Cu(Ⅱ), Pb( Ⅱ ), Cd( Ⅱ ), Ni( Ⅱ ), Zn( Ⅱ ), Fe( Ⅱ ) and Mn( Ⅱ ), forming in the substrate solution (pH=9.26) cons
Aligned Solidification Structure of the MnBi Phase in Semisolidified Bi-Mn Alloy with a Static Magne
The solidification structure of Bi-3 wt pct Mn alloy grown up in the semisolid zone under the influence of a static magnetic field (up to 1.0 T) and the relatio
在实际应用中,传统多目标演化算法面临着高维多目标优化问题.针对这一缺陷,提出正交E占优(Orthogonality E-dominant,OE)策略.在OE策略的理论优越性设计的基础上,改进了当前5
以SCI收录的知识研究相关文献为对象,对国际知识管理研究的领域分布情况进行知识地图分析.引入G-N聚类算法,对知识管理研究的领域知识地图进行聚类分析.研究表明,知识管理研