我国南方红壤丘陵区农机农艺配套融合的问题及对策建议     

王萍  李瑶  夏文建  曹晓林  刘秀梅 《江西农业学报》2015,(3):108-112

对南方红壤丘陵山区农业生产现状进行分析,探究南方红壤丘陵区在发展农机农艺配套过程中存在的制约因素,并提出了相应的对策建议。在南方红壤丘陵区特殊自然条件下,科学适度发展和推广农机农艺配套融合工作,可以着重从保证技术供给、促进标准化生产发展,扩大经营规模、加大科研投入力度,推进体制创新、提高农机农艺融合效率3个方面着手,从而为保证国家粮食安全做出更大的贡献。  相似文献   

不同施肥模式对豫中植烟土壤理化性状及土壤微生物数量的影响   总被引：1，自引：1，他引：0  

阎小毛  闫伸  李彦平  郭芳阳  曹小涛  孙永军 《江西农业学报》2015,(3)

以豫烟10号为材料,分析了不同施肥模式对烤烟土壤理化性状及土壤微生物数量的影响。结果表明:在烟株生育过程中大部分时期,优质烟叶生产技术施肥模式和优质高效生产技术施肥模式土壤含水量高于常规生产技术施肥模式和烟叶丰产技术施肥模式,而容重低于此2种施肥模式。各处理土壤速效氮、速效磷、速效钾及有机质总体变化为先升高后降低的趋势,在移栽30~50 d达到最高,p H变化不明显;优质烟叶生产技术施肥模式和优质高效生产技术施肥模式土壤速效氮、速效磷、速效钾及有机质含量较高。各处理土壤中细菌、真菌和放线菌数量均随移栽天数增加呈单峰曲线变化,且在60 d左右达到最高峰;优质烟叶生产技术施肥模式和优质高效生产技术施肥模式土壤微生物数量总体高于其他处理。  相似文献   

红壤丘陵区小型花生播种机的设计和试验研究     

药林桃  曹晓林  董力洪  陈盾 《江西农业学报》2015,(4):78-80

根据江西红壤丘陵区花生种植的特点,设计了以4~6kW柴油机为动力,采用窝眼轮式排种器、链条传动的小型花生播种机。通过室内和田间性能测试,该播种机的播种行距、株距、播种深度、漏播率、种子破碎率等技术指标基本上能满足花生播种的要求。  相似文献   

巴彦淖尔市设施农业发展现状、存在问题及对策     

王军义  门光耀  曹巨峰  王学敏 《内蒙古农业科技》2015,(2):117-118

近年来,巴彦淖尔市设施农业发展迅速。但随着该市设施农业发展规模的不断扩大,在建设、生产、销售等方面逐渐凸显出一些问题。阐述了当前巴彦淖尔市设施农业的发展状况,并针对存在的主要问题提出了相应对策。  相似文献   

干湿交替灌溉改善稻田根际氧环境进而促进氮素转化和水稻氮素吸收   总被引：1，自引：0，他引：1  

曹小闯  刘晓霞  马超  田仓  朱练峰  吴龙龙  张均华  金千瑜  朱春权  孔亚丽  虞轶俊 《植物营养与肥料学报》2022,28(1):1-14

[目的]阐明不同水氮管理模式下水稻根际内外氧环境变化特征及其对土壤碳氮转化和水稻氮吸收利用的影响,以期从稻田"根际氧环境"调控角度揭示适宜水氮耦合促进水稻生长和提高氮素利用效率的内在机制.[方法]在长期定位试验基础上,采用根箱模拟培养以及Unisense微电极系统和15N同位素示踪相结合的研究方法,以常规粳稻日本晴和常...  相似文献   

无土栽培缺镁黄瓜补镁方法与效果研究   总被引：2，自引：2，他引：0       下载免费PDF全文

妙晓莉  邹志荣  曹轩峰 《西北农业学报》2006,15(2):117-119

针对杨凌新天地设施示范园无土栽培黄瓜出现缺镁这一生产问题,采用MgSO4溶液进行叶面喷肥和植株灌根,分别设0.2%、0.4%和0.6%三个浓度处理。试验结果表明,采用浓度为0.4%的MgSO4溶液进行叶面喷肥,叶片叶绿素含量、光合速率和小区产量均极显著高于其它处理,可以在生产中推广应用。  相似文献   

LB空间上的纲性定理     

曹定华  朱起定  李丹衡 《湖南农业大学学报(自然科学版)》2002,29(3)

给出了局部凸空间是第二纲空间的一个必要条件 ,证明了( LB)空间 (它是不可赋范的 ,完备的桶式空间 )是第一纲空间 ,进而回答了桶式空间中是否有第一纲空间和不可赋范的局部凸空间 X的强对偶 X* 是否一定不可距离化的问题  相似文献   

间接ELISA检测猪伪狂犬病血清抗体   总被引：9，自引：0，他引：9  

邱德新  陈焕春  何启盖  吴斌  曹胜波 《中国兽医学报》2002,22(2):149-152

用猪肾传代细胞IBRS－2增殖猪伪狂犬病病毒（PRV）鄂A株，病毒培养上清液经硫酸铵沉淀、聚乙二醇（Mr20000）浓缩后作为包被抗原。用纯化的猪血清IgG免疫家兔，HRP村记撮的兔抗猪IgG，制备出高效价的酶标抗体，酶标抗体工作浓度为1：50000；经各种条件的选择，建立了检测猪伪狂犬病血清抗体的间接ELISA。所建立的间接ELISA抗原包被浓度为39.2mg/L，血清最佳稀释度为1：20，与猪细小病毒、猪、O型口蹄疫、猪衣原体标准阳性血清呈阴性反应，与标准阴性血清和临床未感染PRV的猪血清呈阴性反应；与猪伪狂犬病标准阳性血清、免疫猪血清和临床发病猪血清呈明显的阳性反应；与美国进口的PRV抗体检测ELISA诊断试剂盒检测结果比较，45份猪血清的阴、阳性检出符合率均为100％。表明建立的间接ELISA具有敏感性高、特异性强、重复性好的优点，可用于猪伪狂犬病血清抗体的定性和定量检测。  相似文献   

Isolation of a rice gene homologous to the human putative tumor suppressor gene QM     

GE Xiao-chun  ZONG Hui  Chen jichao  CAO Kai-ming  SUN Chongrong 《水稻科学》2002,10(2)

QM gene was originally isolated from human by Dowdy et al during a search for a wilms′ tumor suppressor gene. Researches of QM gene focused mainly on animals and yeasts, little was known about plant QM gene. For better understanding of QM gene in rice, a QM homologous fragment was used as a probe to screen rice (Oryza sativa subsp. indica c.v. Guanglu′ ai 4) genomic DNA library,and two clones were obtained. One of them, OSQM2, encoded a highly basic protein of 184 amino acids, the sequence was about 3.1 kb long with a very special promoter region compared with other known QM genes. Seven potential G boxes could be found between -690 and -230. G box, which contains a ACGT core motif, had been reported in many plants to act as a cis acting DNA element in the regulation of genes in a variety of environmental conditions, such as ABA regulated gene expression, red light, UV light, anaerobiosis, and wounding etc. Two closely linked DRE related motifs (dehydration responsive element) could also be found between -182 and 173, which had a CCGAC conserved sequence and had been identified in many cold and drought responsive genes in Arabidopsis. Six MYC recognition sequences with the conserved motif NCANNTGN were also presented, which might be essential for ABA and drought responsive expression of the plant genes.  相似文献   

The Relationship Between Temperature & Sunshine and Spring-Sown Wheat Quality     

CAO Guang-cai  WU Dong-bing  SUN Qun  QIANG Xiao-lin  CHEN He-qin  DONG Mei  KOU Hao  WANG Jian-lin  HOU Li-bai  LI Meng 《中国农业科学(英文版)》2003,2(12)

In order to study the relationship between temperature&sunshine and spring-sown wheat qua lity,a spring-sown experiment with 3 wheat varieties was conducted in Rikaze,Lasa,Linzhi,Beijing and Shenyang from 1998 to 2001.The results indicated that significant difference on some quality characteristics of experimental wheat varieties were observed from different locations and different years.The results also showed:protein content was positively correlated with wet gluten content,falling number,the average day temperature and sunshine hours from heading to maturation;and negatively correlated with the growing days and the average diurnal temperature difference from sowing to maturation;wet gluten content was positively correlated with the average day temperature and sunshine hours during the same period.Sedimentation value and falling number were positively correlated with the average sunshine hours from sowing to maturation.The basic way of wheat production in Tibet was as follows:mainly developing medium gluten wheat varieties,suitably planting weak gluten wheat varieties,introducing some inland excellent varieties.  相似文献