不同产量水平超级杂交稻产量形成特征及其对施肥量的响应   总被引：2，自引：0，他引：2  

程慧煌  商庆银  易振波  郑厚亮  曾勇军 《中国稻米》2017,(4):81-88

为了探究不同产量水平超级杂交稻产量形成特征及其对施肥量的响应,以超级杂交稻两优培九、Y两优1号、Y两优2号、Y两优900和超优千号为供试材料,研究不同施肥水平(纯N用量分别为0、210、300和390 kg/hm~2,N∶P_2O_5∶K_2O=2∶1∶2,以F0、F1、F2、F3表示)对各品种产量及群体质量的影响。结果表明,在施肥水平为F0和F1时,Y两优2号的产量比两优培九和Y两优1号高,主要表现在其具有较高的有效穗数,以及茎蘖成穗率、叶面积指数、干物质积累量和收获指数;在施肥水平为F2和F3时,Y两优900和超优千号产量较高,主要表现在其具有较高的每穗粒数,以及粒叶比和收获指数。在不同施肥水平下,随着施肥量的增加各品种的每穗粒数、粒叶比和收获指数呈先增后降的趋势,有效穗数和叶面积指数呈增加的趋势(两优培九除外)。由上可知,在相对较低的施肥水平下,Y两优2号相比于两优培九和Y两优1号能获得更高产量,主要依靠的是其具有较高的有效穗数;而在较高的施肥水平下,Y两优900和超优千号更具有获得高产的潜力,且主要依靠较高的每穗粒数,较低的有效穗数是限制其获得更高产的主要原因。  相似文献   

油桃新品种‘红雨’     

张金云  潘海发  高正辉  孙志想  伊兴凯  齐永杰  秦改花  张晓玲  郭传翔  束冰  徐义流 《园艺学报》2017,44(7):1415-1416

‘红雨’油桃是从‘中油桃9号’变异中选出的早熟黄肉新品种。果实近圆形;平均单果质量152g,最大达223g;果顶微凹,缝合线中深;果柄粗短,梗洼深广;完全成熟后果面80%以上鲜红,底色黄绿,果肉橙黄;硬溶质,肉质细脆,风味甜酸,可溶性固形物9.45%,去皮硬度9.46 kg·cm~(-2),粘核,不裂果;果实货架期较‘中油桃9号’长3~5 d。在砀山地区露地栽培,6月10日左右果实成熟,果实发育期约75 d。适合保护地栽培。  相似文献   

茶旅融合与互动发展:模型建构与效果测度——基于浙江省的实证研究   总被引：1，自引：0，他引：1  

易开刚  李解语 《茶叶科学》2017,37(5)

茶旅融合与互动发展是茶产业及旅游产业发展的内在需求,对于破解茶产业利润增长瓶颈具有重要意义。本研究以浙江省为例,在产业融合理论及耦合理论指导下,构建了包含茶旅融合动因、融合路径、融合效益的机理模型,并通过构建耦合函数模型对浙江省茶旅融合情况进行实测,发现浙江省茶旅产业均处于增长阶段,但旅游产业的发展比茶产业更慢,且茶产业对旅游产业具有明显的引领作用,此外,茶旅融合程度也从失调状态发展到耦合协调状态。最后,本文针对如何进一步促进浙江省茶旅融合发展,突破茶产业的发展难题,实现茶产业转型升级,从产品创新、加强宣传、完善配套、培育一体化品牌4个方面提出相应的对策和建议。  相似文献   

基于统一年产值的土地承包经营权抵押价格探讨     

易忠君 《贵州农业科学》2013,(2):201-203,207

土地承包经营权抵押工作已在宁夏、湖北、河南、贵州和重庆等省(市、区)的部分地区进行了试点,很好地解决了农村发展中的资金问题,对当地农村经济的发展起到巨大的促进作用,但实践中如何科学、准确、合理地确定土地承包经营权的抵押价格,成为困扰土地抵押融资工作的难题。以土地统一年产值为基础,运用实例调查法、收益还原法和对比法分析了土地承包经营权的价值,并最终确定土地承包经营权的抵押价格。  相似文献   

UWB多径信道下RAKE接收和均衡的作用分析     

肖竹  李仁发  易克初 《湖南农业大学学报(自然科学版)》2013,40(4):94-99

基于科技创新投入、产出、支撑和转化等四个影响因素，构建新能源储能企业科技创新能力评价模型，并运用主成分分析法和聚类分析法，对我国主要新能源储能企业的科技创新能力进行分析和评价.分析表明，我国新能源储能企业科技创新的能力主要取决于经费投入和科研能力两大因素.新能源企业科技创新的研发经费投入、科研人员配备、科研成果等方面，与国外企业相比差距大，科技创新能力亟待提高.  相似文献   

植物保护专业实验室开放的探索与实践     

林巧玲  何红  易润华 《现代农业科技》2012,(18):329-330

阐述实验室开放的意义、具体实施过程、效果以及开放中存在的问题,并提出解决办法,以为相关专业实验室开放提供参考。  相似文献   

有限群体中杂交后代质量性状表型分布的预测     

顾志刚  衣鹏  孙宏雁 《黑龙江畜牧兽医》2000,(3):11-12

利用二项分布对有限群体中仅产生两种理论基因型(或表现型)的特定杂交组合后代可能出现情况的概率预测问题加以推广,应用多项分布,解决了有限群体中已知基因型的杂交组合同时考虑多个性状而有多种理论基因型(或表现型)后代的各种可能出现情况的概率预测问题.  相似文献   

Design of CS-150 Potato Harvester     

Mao Xin  YI Shujuan 《黑龙江八一农垦大学学报》2008,20(5)

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Preparation and Evaluation of Mixed Probiotics for Chicken Against Escherichia coli Infection     

YI Haiming  ZHANG Qiang  ZHAO Xuejin  YANG Li  JIN Meilin 《中国畜牧兽医》2007,47(11):3676-3686

The purpose of this study was to explore the effects of probiotics on chickens' resistance to Escherichia coli infections,and to provide a basis for the development of microecological agents.Based on the Oxford Cup test and the bacterial adhesion inhibition test,three kinds of probiotics and their equal proportion mixed bacterial liquid with good effect of inhibiting Escherichia coli in vitro were obtained initially:Lactobacillus plantarum ZN-3,Lactobacillus rhamnosus QC,Clostridium butyricum HYCB and mixed bacteria preparation X.The 7-day-old SPF chicks were continuously orally fed with probiotics for 30 days and infected with Escherichia coli XT-13 once a day from the 26th to 30th day,and the survival rate and weight change were recorded.Through the same oral and infection protocols,the chicks were necropsied after infection with XT-13,and the results of necropsy and pathology were analyzed,and the amount of bacteria in the liver and intestines was detected by immunohistochemistry.In addition,in order to analyze the effect of oral administration of mixed probiotic preparations on cytokines in chickens infected with Escherichia coli,non-lethal doses of XT-13 were selected to infect chickens,and the levels of interleukin-10 (IL-10),interleukin-17 (IL-17) in serum and avian defensin-β1 (AvBD1) in the liver were measured on the 4th,8th and 14th days after infection.At the same time,the bactericidal ability of the serum was tested on the 14th day after infection.Finally,the broad-spectrum protection ability of probiotics to O78 serotype Escherichia coli AV006 infected chickens was evaluated.The results showed that the antibacterial effect of the supernatant of each probiotic fermentation broth was obvious,and the mixing of probiotics could reduce the adhesion rate of XT-13 to DF-1 cells (P<0.05).The weight gain effect of mixed probiotics was better than that of single probiotics,which had a good protective effect on chickens infected with XT-13.The survival rate was 87.50%.The mixed probiotics significantly reduced the load of XT-13 in liver and large intestine,alleviated the pathological damage,and regulated the levels of IL-10 and IL-17 in serum and the levels of AvBD1 in the liver,while improving the bactericidal ability of the serum.In addition,the broad-spectrum protection test showed that the mixed probiotics reduced the mortality of chickens infected with O78 serotype Escherichia coli.Therefore,the mixed preparation of Lactobacillus plantarum ZN-3,Lactobacillus rhamnosus QC and Clostridium butyricum HYCB could promote chick weight gain,reduce bacterial load,reduce tissue lesions,regulate the host's immune response,and had a good prevention effect on avian colibacillosis,which had a great potential to develop into a probiotic preparation against avian colibacillosis.  相似文献   

Advances of the mechanisms of renal tubular cell injury     

YI Xue-jie  CHANG Bo 《园艺学报》2000,16(4):377-380

The nature of renal tubular cell injury in ischemic acute renal failure includes not only cell death (necrosis or apoptosis) but also sublethal injury causing cell dysfunction. The role of intracellular calcium, calcium-dependent enzymes calpain, nitric oxide, phospholipase A2, loss of tubule cell polarity and tubular obstruction in the pathophysiology of the renal tubular cell injury during hypoxia/ischemia is described. The effects of vascular factors, infiltrating activited leukocytes, apoptosis and growth factors on renal tubular cell injury are discussed. Potential mechanisms that tubular injury leads to a profound fall in glomerular filtration rate are proposed.  相似文献