Impact of biochar on red paddy soil physical and hydraulic properties and rice yield over 3 years     

Chen  Can  Zhu  Hongxia  Lv  Qing  Tang  Qian 《Journal of Soils and Sediments》2022,22(2):607-616

Journal of Soils and Sediments - Biochar is a promising soil amendment to improve soil quality. This study was conducted to understand the effect of biochar on soil physical and hydraulic...  相似文献   

Effects of berberine and yohimbine on splenocyte apoptosis in septic mice     

JIA Bao-yin  YANG Duo-meng  WANG Yuan  LI Hong-mei  YU Xiao-hui  Lv Xiu-xiu  LU Da-xiang  WANG Hua-dong 《园艺学报》2014,30(12):2206-2212

AIM: To observe the effects of berberine and yohimbine on splenocyte apoptosis in septic mice and underlying mechanisms. METHODS: The mice were subjected to cecal ligature and puncture (CLP). The drugs or vehicle were given intragastrically 2 h after the surgery according to the following 5 groups: sham, CLP, CLP+berberine, CLP+yohimbine, and CLP+berberine+yohimbine. The apoptosis of splenocytes stained by TUNEL was observed under laser scanning confocal microscope 20 h after CLP. The splenic lymphocytes were isolated and observed using flow cytometry. The activities of caspase-3, caspase-8 and caspase-9 in splenic lymphocytes were detected, and the expression of Fas, Bim, Bcl-2 and Bax in the splenocytes was also determined by Western blotting. RESULTS: The TUNEL staining showed that the apoptotic rate of the splenocytes in septic mice 20 h after CLP was significantly higher than that in sham and CLP+yohimbine groups (P＜0.05). Compared with CLP group, the proportion of apoptotic cells was decreased in septic mice in CLP+berberine+yohimbine and CLP+yohimbine groups (P＜0.05). Flow cytometry analysis demonstrated the similar results in the apoptosis of splenocytes and T lymphocytes. However, only yohimbine treatment reduced the apoptosis of B lymphocytes in the spleen of sepsis-challenged mice. Compared with CLP group, caspase-9 activity was significantly reduced in CLP+berberine group (P＜0.05), the activities of caspase-3, caspase-8 and caspase-9 were all statistically reduced (P＜0.05) in CLP+yohimbine group and CLP+yohimbine+berberine group. CLP significantly increased the expression of cytosolic Fas, Bim and mitochondrial Bax in the splenocytes, and decreased Bcl-2 expression compared with sham group. Compared with CLP group, the expression of cytosolic Bim and mitochondrial Bax in CLP+berberine group were reduced (P＜0.05). Fas expression decreased only in CLP+yohimbine group (P＜0.05). Berberine combined with yohimbine reduced the expression of cytosolic Fas, Bim and mitochondrial Bax in the septic mouse splenocytes (P＜0.05).CONCLUSION: Yohimbine reduces sepsis-induced splenic lymphocyte apoptosis in mice by inhibiting Fas expression and in turn blocking both extrinsic and intrinsic apoptosis pathways. Berberine reduces Bim expression and inhibits caspase-9 activation, but not caspase-3 activation and apoptosis in the septic mouse splenocytes. Berberine combined with yohimbine reduces splenocyte apoptosis in the septic mice by inhibiting both extrinsic and intrinsic apoptotic pathways.  相似文献   

河南省中肥小麦新品种稳产性分析和品种评价     

张清海  吕德彬  崔党群  荆清文 《河南农业大学学报》1989,(4)

采用联合方差和回归分析方法对河南省5个中肥小麦品种8个试点的产量资料进行了分析,结果表明,豫麦十二号宜在亩产300公斤以上的环境条件下种植,而郑州853则宜在300公斤以下的产量水平环境条件下能够发挥较大的增产潜力。与其它参试品种相比,博农7023产量较低,故不宜再推广种植。本文还结合其它性状的考查,综合评阶了各品种的利用价值。  相似文献   

浙江慈溪杭州湾湿地中心水鸟资源调查     

吕咏  殷世雨  John Howes  朱冰润 《野生动物》2011,32(6):312-315

湿地国际-中国办事处项目组水鸟专家于2009年8月21～22日对浙江杭州湾湿地中心项目区及其邻近湿地的水鸟进行了全面调查。本次调查,采用定点观测与路线调查相结合的方法,共统计到水鸟7科46种,数量超过1万只,其中迁徙的鸻鹬类为26种。描述了杭州湾湿地中心迁徙水鸟的种类、数量分布及其重要性。为全面评估和了解杭州湾湿地中心的水鸟资源,为杭州湾湿地中心正在建设的野生动物湿地管理提供本底数据和依据。并对将来改善杭州湾湿地中心迁徙水鸟的保护提出了建议。  相似文献   

Effects of transportation on expression of Hsp90, Hsp70, Hsp27 and αB-crystallin in the pig stomach     

Zhang M  Lv Y  Yue Z  Islam A  Rehana B  Bao E  Hartung J 《The Veterinary record》2011,169(12):312

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兴安落叶松木材提取物的组成分析   总被引：4，自引：2，他引：4  

崔永志  方桂珍 《东北林业大学学报》1997,25(1):38-40

采用＾１３ＣＮＭＲ核磁共振波谱法、光吸收法和化学分析方法对兴安落叶松的心、边材抽出物进行了定量分析，测定了不同溶剂抽出物的含量及有关组成，实验数据可为落叶松的加工利用及化学改性提供理论依据。  相似文献   

水青树苯醇提取物的化学成份研究     

柳顺熙  方桂珍 《东北林业大学学报》1992,20(2):49-54

实验用苯+乙醇(2:1V/V)混合溶剂抽提水青树木粉,所得提取物用CH_2N_2甲基化后,用GC和GC—MS分离鉴定其中的各种化学成份,共分离出了20种成份。其中烃类两种:去氢白菖烯,2,6,10—三甲基十二烷;芳香族化合物十种:3—甲氧基苯甲醛,4—甲氧基苯甲酸甲酯,4—甲氧基苯丙酮,3,4—二甲氧基苯甲醛,3,4—二甲氧基苯乙酮,3,4—二甲氧基苯甲酸甲酯,3,4—二甲氧基苯丙烯酸甲酯,3,4,5—三甲氧基苯甲酸甲酯,4—甲氧基苯丙烯酸甲酯,4,4′—双甲酯基二苯乙烷;甲酯化的脂肪酸八种:肉豆蔻酸甲酯,棕榈酸甲酯,棕榈油酸甲酯,硬脂酸甲酯,油酸甲酯,花生酸甲酯,山榆酸甲酯和壬二酸二甲酯。  相似文献   

郑州市郊区土壤综合肥力评价及空间分布研究     

吕巧灵  付巧玲  吴克宁  康超  韩春建 《勤云标准版测试》2006,(1)

用修改后的内梅罗公式作为土壤肥力的评价模型,将传统的统计方法与地统计学方法及GIS技术相结合,研究了郑州市土壤肥力的空间变异规律,对郑州市土壤质量进行了定量化的评价。结果表明,郑州市土壤速效磷以差级水平为主,全氮含量中等之外,pH、速效钾、CEC和有机质均以中等级以上水平为主;相对来说,速效磷含量总体较低是郑州市土壤肥力的主要限制因子郑州市土壤综合肥力系数的空间分布总体上具有以下特征:在东北西南方向上,土壤的综合肥力系数很较低,大面积处在差的水平,其中少面积具较高肥力。东南和西北方向的肥力较高,大部分处在良和中的水平。  相似文献   

海南琼海市耕地施肥现状及对策     

吕烈武  吴琼泽  黄顺坚 《勤云标准版测试》2006,(8)

通过2004年琼海市耕地地力和施肥状况调查,共取水稻土土壤样品137个,其中冬种反季节瓜菜基地92个,其他田块45个。分析土壤养分和施肥状况的影响,对应提出以下4条改良和解决地力问题的措施:①抓好有机肥的施用,培肥地力,促进农产品优质高产;②氮、磷、钾化肥的平衡施用;③中量微量元素的平衡施用;④加强肥料质量监测,确保农民用上合格肥料。  相似文献   

长沙地区荷泽牡丹病害发生规律及防治药剂筛选     

易图永  吕长平  李璐 《勤云标准版测试》2006,(9)

对山东荷泽牡丹在湖南长沙地区种植时病害进行了病原物分离鉴定,确定其主要病害有牡丹灰霉病、牡丹褐斑病、牡丹红斑病、牡丹枝枯病和牡丹根腐病。并对主要病害的发生发展规律进行系统调查,发现病害的发病高峰期为6—8月,随降雨量的增加,田间相对湿度变大,病情加重。通过室内药剂筛选试验,表明75%代森锰锌可湿性粉剂对5种病原菌都有很好的抑制作用,25%咪鲜胺乳油对牡丹灰霉病菌、牡丹褐斑病菌、牡丹红斑病菌和牡丹根腐病菌有较好抑制作用,对牡丹枝枯病菌基本上没有抑制作用。  相似文献