火山岩和沸石填料BAF深度处理印染废水的效能比较

针对纺织印染行业水质不达标回用率低的问题,采用火山岩和沸石为填料的曝气生物滤池对纺织印染废水二级生化出水进行了深度处理,进行了两反应器出水效能的比较。研究表明:火山岩填料深度处理纺织印染废水的效能要高于沸石填料,建议气水比在10∶1左右,出水CODcr为36~48mg/L,出水色度35~55度,NH3-N浓度0.5~1.7mg/L,出水浊度范围0.9~3NTU。     

Transformation of Phosphorus in Forest and Savannah Agro-Ecological Alfisols incubated with Different Phosphorus Fertilizers,in Ekiti state,Southwestern Nigeria

Experiments on incubation with phosphorus (P) changes in two Nigerian Alfisols, were evaluated on the effectiveness of P sources (ground phosphate rock, GRP-9% P, Pace-setter Organo-Mineral Fertilizer (PR-fortified P-S-OM, 11% P and single superphosphate, SSP-7.7% P, for reference). All samples were adjusted to water tension measured at M Ψ w = 0.03 MPa. Changes in applied P were evaluated at 2, 6, 12 and 24 weeks after which data were analyzed using analysis of variance and correlations. Over 24 weeks of incubation, SSP transformed mostly into iron (Fe)-bound P and GPR produced the highest inorganic phosphate ions and transformed largely into the soluble and more chemically stable residual P, in both soils. This fraction, had high and positive correlations (r = 0.69, p < 0.05) with soil properties and constituted a major source and sinks of plant available P. Thus, GPR contributing beneficial effects of residual phosphates.     

Soil bulk density corrections for providing a better relationship with root growth in gravelly soil

Abstract

Bulk density of a Tifton (Plinthitic Paleudult; fine loamy, siliceous, thermic) soil containing 5.8 to 11.0% of the sample weight as pebbles was 0.06–0.12 g/cc lower when corrections were made for presence of pebbles or concretions. A method for determining the bulk density of the soil matrix between pebbles or concretions is outlined. After adjustment, the bulk density at which root penetration was inhibited in this soil closely approximated that for soils which do not contain concretions. The proposed procedure reflects more nearly how bulk density changes where plant roots are growing than previously published procedures do.     

阜平表壳岩的地质特征

依据野外调查资料和室内化学分析，组建了阜平表壳岩的填图单元，单元分为阜平表壳岩上部和阜平表壳岩下部岩石。上部岩石原岩为沉积岩，属角闪岩相，无紫苏辉石，具有变余沉积层理和韵律构造，塑性变形差，从下到上可见片麻岩、浅粒岩、大理岩、斜长角闪岩的大韵律，角闪岩中还见小韵律；上部表壳岩的斜长角闪岩中SiO2、CaO、Mg0的含量均高于下部1％左右。下部岩石原岩为火山岩，见变余火山杏仁状构造和枕状构造，为麻粒岩相，含紫苏辉石，塑性变形强烈，原岩构造保留较少。上下岩石无直接接触关系，从下部岩石中测得Rb-Sr全岩同位素年龄为2700～2900Ma，属太古代岩石。     

坚持治理开发 山乡面貌大变

坚持治理开发山乡面貌大变柴学松（四川省铜梁县水土保持办公室，６３２５６０）铜梁县双山乡位于涪江支流平滩河的上游，北、西、南三面为坪块低山环绕，中部由七沟八梁的中低丘陵与宽谷构成，在总面积为３３．８３ｋｍ２的范围内，水土流失面积达１３．６４ｋｍ２，森林...     

海南岛土壤磷吸持性及其在分类中的意义

本文根据海南岛不同土壤类型的65个剖面310个土层的土壤磷(P)吸持性的测定结果,讨论土壤P吸持性与土壤类型、母岩(母质)种类、及土壤黏粒、铁铝氧化物含量之间的关系,并阐明土壤P吸持性在该地区土壤分类中的意义, 供为选用土壤分类指标参考。     

园林石峰与造型艺术

本文根据较为丰富的史料,从造型艺术的美学角度出发,阐述园林石峰的造型艺术价值、品石标准、园林石峰与诗画之间的关系以及历代诗画名人嗜石成癖与搜罗奇峰异石的种种趣事。     

综合治理水土流失全面发展山区经济

综合治理水土流失全面发展山区经济佘国云（湖南省怀化地区行政公署，怀化市４１８０００）怀化地区位于湖南省的西南部，与黔、川、桂、鄂四省相毗邻，辖１２个县（市）３３７个乡（镇），４０６５个村，居住着汉、土家、侗、苗等３２个民族的４６６万人。全区总面积２．...     

青海省贵南县以草定畜、草畜平衡试点及做法

通过对三年来贵南县以草定畜、草畜平衡试点工作开展情况的总结和分析,试点取得了显著效果。     

沙角衣藻—杂交水稻实验体系在不同供磷条件下生长情况的研究

以磷为主要限制因素,研究沙角衣藻(ChlamydomonassajiaoLewin)—杂交水稻(O.sativaL.)所组成的实验体系在不同供磷条件下的生长情况。作者设计了含可溶性有效磷、含磷矿石粉和不含磷的三种藻类培养基,培养基中的沙角衣藻分别以见光和黑暗培养进行对比实验,并以不加沙角衣藻的平行实验组作为参照。培养两周后记录培养基中的沙角衣藻的活藻生物量、有效磷浓度和水稻的植株高度增长率以及水稻中的含磷量。其中,全磷培养基和含磷矿石粉的无磷培养基中杂交水稻正常生长,而且沙角衣藻生物量、培养基有效磷浓度均较实验前有所增长;而其他实验组水稻均出现不同程度的缺磷表征。研究结果发现,在正常光照条件下,沙角衣藻从矿石磷中释放的可溶性的有效磷可以同时供杂交水稻和沙角衣藻使用,使二者在同一环境中正常生长。