科尔沁地区禾豆混播人工草地生产特性分析     

张淑艳  张永亮 《中国草地学报》2003,25(5):32-37

在科尔沁草原地区进行了不同草种和不同播种量组合的混播人工草地生产特性的研究。结果表明,无芒雀麦、苇状羊茅、披碱草、鸭茅、紫花苜蓿均具有较强的种间竞争能力,种间相容性较好;白三叶、草地早熟禾、猫尾草在苗期种间竞争能力较弱,幼苗死亡率较高,生长发育不良。在生产特性方面,草地早熟禾+鸭茅+猫尾草+紫花苜蓿+白三叶(组合Ⅰ)草地豆科牧草平均产量显著大于禾本科牧草产量(P<0.01);无芒雀麦+苇状羊茅+披碱草+紫花苜蓿+白三叶(组合Ⅱ)草地禾本科与豆科牧草产量差异不显著(P>0.05)。在全年总产量中,组合Ⅱ的禾本科牧草产量显著大于组合Ⅰ(P<0.05)。在本试验条件下,适宜的混播组合是:无芒雀麦占40.3%,苇状羊茅+披碱草占32.9%,紫花苜蓿占26.8%,总播种量37.3kg/hm2,全年干草总产量可达8580.12kg/hm2,其中禾本科牧草占50%左右,适合于放牧刈割利用。  相似文献   

印楝素、高效氯氰菊酯及其混剂对菜青虫的毒力与药效     

SONG Zhongrong HE Jiahong GAO Zhiqiang ZHU Qihong WAN Lin 《长江蔬菜》2008,(6)

测定了印楝素与高效氯氰菊酯对菜青虫的毒力,并筛选了2种药剂的最佳复配比例。结果表明,印楝素与高效氯氰菊酯按1:1的比例复配,增效作用最为明显,共毒系数达到187。综合考虑药效、成本等因素,确定2.5%混剂(1.25%印楝素 1.25%高效氯氰菊酯)进行田间试验,结果表明2.5%混剂对菜青虫的防治效果高于2种单剂,具有推广价值。  相似文献   

Effects of Zao Huang Mixture (藻黄合剂) on the Expressions of TGF-β1 and Col IV in Human Glomerular Mesangial Cells Cultured in High Glucose Environment     

JU Jian-wei  MU Shou-han  YIN Yan-zhi  L Cong-kui  SUN Xiao-yan  DENG Lei-xiu 《新农业》2012,31(4)

Objective:To investigate the effect of Zao Huang Mixture (藻黄合剂 ZHM) on expressions of growth factor-β1(TGF-β1) and collagen IV (Col IV) in human glomerular mesangial cells (GMC) cultured in high-gl...  相似文献   

硫包膜和树脂包膜控释尿素混施对土壤氮素代谢及番茄品质的影响     

丁坤  王秀峰  杨凤娟  张民  魏珉  史庆华 《西北农业学报》2013,22(4):147-152

在日光温室盆栽条件下,研究尿素（U）、硫包膜控释尿素（SCU,控释期4个月）和树脂包膜控释尿素（RCU,控释期6个月）混施（各提供一半氮素）在同等氮素及减氮30%和50%条件下,对土壤氮素代谢及番茄品质的影响。结果表明,所有取样时期,番茄植株干物质质量、土壤碱解氮含量及酶活性均随氮素用量减少而降低。同等氮素条件下,定植30 d后,硫包膜和树脂包膜控释尿素混施处理下,番茄植株干物质质量、土壤碱解氮含量、土壤脲酶和硝酸还原酶活性均低于尿素处理;定植60 d和90 d后,硫包膜和树脂包膜控释尿素混施处理下,其上述指标均高于尿素,定植60 d后,在减氮30%条件下,其番茄植株干物质质量、土壤碱解氮含量、土壤脲酶、硝酸还原酶、亚硝酸还原酶和羟胺还原酶活性与100%尿素用量处理无显著差异;且所有取样时期,硫包膜和树脂包膜控释尿素混施处理下,其土壤亚硝酸还原酶和羟胺还原酶活性均高于尿素处理。同等氮素条件下,硫包膜和树脂包膜控释尿素混施能有效降低番茄果实中硝酸盐含量,提高其维生素C含量和糖酸比,说明能改善番茄果实品质。  相似文献   

不同氮素肥料对混播草地牧草生产性能的影响     

范彦  徐远东  何玮  张健 《草业与畜牧》2012,(11)

分别利用沼液和尿素进行混播草地施肥试验,结果表明,混播草地中牧草的产量受到氮肥种类、施氮水平和环境温度的限制。在环境温度较高时,施入尿素含量越高,牧草生长速率较快,产量越高;而当秋季温度较低时,豆科牧草长势旺盛,因此氮肥对混播牧草产量的影响相对较小;同时,由于沼液对土壤的培肥作用较好,以大量施入沼液的牧草长势较好,产量较高。  相似文献   

A two generation chronic mixture toxicity study of Clophen A60 and diethyl phthalate after gestational and lactational exposure in female Wistar rats     

Contzen Pereira  C. Vaman Rao 《Pesticide biochemistry and physiology》2007,88(2):156-166

Polychlorinated biphenyls and diethyl phthalate are both lipophilic in nature and are likely to be present in the same environmental compartment or bioaccumalate over a period of time, thus a mixture toxicity study was undertaken to evaluate the type of interaction between polychlorinated biphenyls (Clophen A60) and diethyl phthalate over two generations in female Wistar rats. Healthy male and female albino rats of Wistar strain weighing 75-100 g (6-7 weeks old) were randomly assigned to four groups of six each. Group I male and female rats were fed on normal diet and water ad libitum. Group II male and female rats were maintained on normal diet mixed with corn oil as oil control. GroupS III and IV male and female rats were given Clophen A60 and diethyl phthalate dissolved in corn oil mixed with the diet at 50 mg/kg of the diet individually to each group. Group V male and female rats received a mixture of diethyl phthalate and Clophen A60, each dissolved in corn oil mixed with the diet at 50 mg/kg of the diet. Hundred days after the treatment, females were mated with the males in each group for 10 days. Exposure to diethyl phthalate and Clophen A60 was continued throughout mating, gestation until termination at weaning, which was 150 days of total treatment period of the parental generation female rats. Treatment for F1 generation male and female pups (6 males & 6 females) with Clophen A60 and diethyl phthalate individually and in mixture was continued at doses reduced to 25 mg/kg of the diet after they reached 75-100 g in weight. The treatment was carried out similar to the parental generation for a period of 150 days. Liver and serum aspartate aminotransferase, liver cholesterol and glycogen were significantly increased in the F1 generation Clophen A60 + diethyl phthalate treated group, whereas serum cholesterol, liver glutathione and glutathione reductase showed a significant decrease in the F1 generation Clophen A60 + diethyl phthalate treated group as compared to the parental generation mixture and individually treated groups as well as the individually treated F1 generation groups. A significant increase was observed in the liver and serum aspartate aminotransferase activity of Clophen A60 and serum aspartate aminotransferase levels of diethyl phthalate treated F1 generation rats as compared to the parental generation Clophen A60 and diethyl phthalate individually and mixture treated rats. Liver glutathione levels were significantly decreased in the F1 generation Clophen A60 and diethyl phthalate individually treated rats which was similar to the parental generation individually treated rats as compared to the controls. Liver glutathione reductase level was also significantly declined in the diethyl phthalate treated F1 individual group as compared to diethyl phthalate individually treated parental generation rats. Histology of the liver showed fatty degeneration in the mixture treated F1 generation rats as compared to Clophen A60 and diethyl phthalate individually treated F1 rats and parental generation Clophen A60 and diethyl phthalate individually and mixture treated rats. Thus, in spite of dose reduction and continuous exposure over two generation’s to a mixture of diethyl phthalate and Clophen A60 exposed through gestation, lactation and diet leads to a synergistic toxic effect in the F1 generation.  相似文献   

豆科与禾本科牧草混播效应研究进展   总被引：11，自引：0，他引：11  

王旭  曾昭海  胡跃高  朱波 《中国草地学报》2007,29(4):92-98

混播技术、种群性状、生产优势、混播方式与土壤肥力间的关系等方面是观察与认识豆科与禾本科饲草混播方式的基本内容。过去大多数研究集中在该体系的地上部及现象方面的研究,今后应加强该体系内地下部种间相互作用与土壤养分吸收利用之间的关系以及种间差异与根际过程调控等方面相关机理的研究,如禾本科与豆科牧草混播种间养分竞争能力差异的生理生态基础研究,种间竞争和促进作用的基因型差异研究,微生物群落及数量变化等方面的研究。通过这些深入研究间混播的资源吸收利用特点与混播因果关系,为禾本科与豆科牧草混播种植方式的进一步发展提供理论基础。  相似文献   

柴达木盆地弃耕盐碱地紫花苜蓿生物量季节动态   总被引：7，自引：1，他引：6  

彭宏春  牛东玲  李晓明  杨慧青  祁迎林  费迎霞 《草地学报》2001,9(3):218

研究柴达木盆地二龄 、三龄混播与单播紫花苜蓿群落地上生物量、生长速率、株高 、盖度的季节动态变化,结果表明,三龄紫花苜蓿生物量、生长速率均高于二龄,但株高间差异不显著(P>0.05)。混播的盖度高于单播、三龄的盖度高于二龄。混播苜蓿的牧草保持稳定比例,单播则变化较大。  相似文献   

洋葱根腐病防治药剂筛选试验     

赵海霞  常国军  张付平  何丹  王雅婷  王学强 《园艺与种苗》2019,(2):22-23,41

[目的]筛选防治洋葱根腐病的有效药剂。[方法]在室内药剂筛选基础上,进行化学药剂筛选的同时,将其与生防菌复配,开展不同药剂田间药效试验。[结果]哈茨木霉菌和15%多菌灵复配对洋葱根腐病的防治效果明显,可增产27.6%。[结论 ]哈茨木霉菌和15%多菌灵复配进行洋葱根腐病的防治,具有防治过程农药毒性小,持效期长,能有效防治洋葱根腐病,降低环境污染的特点,生产中可作为防治洋葱根腐病的有效药剂推广使用。  相似文献   

清燥合剂联合硝酸甘油软膏治疗血热肠燥型肛裂的疗效观察          下载免费PDF全文

毛玲娟  郑雪平  陈伟  王兴宝  孙雨晴 《勤云标准版测试》2019,39(4):528-531

目的 观察清燥合剂联合硝酸甘油软膏治疗血热肠燥型肛裂的临床疗效。方法 选取72例肛裂、中医辨证分型为血热肠燥型的患者,随机分为对照组和观察组,每组36例。对照组予硝酸甘油软膏局部外涂,观察组在对照组基础上予清燥合剂口服,两组均治疗7 d,比较两组疼痛评分、便秘程度评分、便血程度评分、裂口愈合时间。结果 观察组总有效率为80.56%,对照组总有效率为58.33%,两组有效率差异有统计学意义（P<0.05）;观察组疼痛评分、便秘程度评分、便血程度评分等方面效果均优于对照组（P<0.05）,观察组裂口愈合时间较对照组缩短（P<0.05）。结论 清燥合剂联合硝酸甘油软膏治疗血热肠燥型肛裂,能够显著缓解疼痛,改善便秘、便血症状,促进裂口愈合,值得临床推广。  相似文献