生物质提取液对脐橙叶片的影响

研究了喷施不同浓度的生物质提取液对脐橙叶片的影响。结果表明:施用生物质提取液后,对脐橙叶片的比叶重、叶绿素含量有明显的促进作用,其中以生物质提取液稀释300倍处理效果最好。     

施用沼肥对油茶苗生长的影响

为了探寻施用沼肥对油茶苗生长的影响规律,设沼肥、沼肥化肥、化肥、不施肥(用作对照)4个处理,就其对油茶苗生长和土壤肥力的影响进行了盆栽试验.结果表明:油茶苗期施用沼渣底肥与沼液追肥,能有效促进其生长,且能提高土壤养分的含量.沼肥组油茶苗苗高的平均增量为(38.23±3.48) cm,苗高增长明显,其地径和冠幅的增量分别...     

甸尾乡沼肥的综合利用

指出了沼肥综合利用是将沼气技术结合农业生产有机肥，使肥料技术的应用发展到一个新领域，取得了较好的经济、社会效益。从浸种，种植等方面对沼肥综合利用技术进行了探讨。     

百喜草在脐橙经济林水土保持中的应用

随着脐橙产业在江西南部的发展,大量低山丘陵地区被开发成为脐橙经济林地。由于缺乏相应的水土保持设施和有效的治理措施,地力下降、水土流失严重等生态问题凸显。本研究提出在脐橙经济林中套种百喜草,通过2a的套种,测定套种百喜草模式下脐橙经济林的土壤理化性质、肥力,分析脐橙树体生长量以及对汛期和旱期水土流失数据的测定与分析,旨在研究这一套种模式的有效性。结果表明,套种百喜草对坡地脐橙经济林的水土保持及肥力保持具有明显效果,且不会影响树体的生长,是丘陵山地脐橙经济林水土保持的有效方法之一。     

施用沼肥有“五忌”

沼肥是一种缓速兼备的好肥料，可增强作物抗旱、防冻能力，提高苗木的成活率。施用沼肥要注意以下五点：     

沼肥在桑树上的应用及技术初探

分析了施甸县桑园桑叶产量低、叶质差、病虫害年趋严重、土壤耕性差的现状，依据沼肥的特性，对桑园进行了施用试验，试验结果表明：施用沼肥的桑园，其桑叶产量、质量、桑树抗病性等一系列性状都比传统性常规施肥表现出了显著的优越性。     

以胡柚作中间砧嫁接外来脐橙试验研究

胡柚适应性强、生长快、结果早、丰产性能好,耐旱、耐寒能力强。以胡柚作中间砧嫁接外来脐橙,嫁接后的脐橙表现出生长快、结果早、耐寒性能提高,脐橙果形品质没有多大变化,中间砧的胡柚及嫁接脐橙周围的胡柚固酸比明显提高。     

金沙江干热河谷区脐橙绿色栽培技术的探讨

金沙江干热河谷光照充足，有效积温高，温差大，发展优质绿色脐橙具独特的地理气候资源。文章详细论述金沙江流域发展绿色脐橙的栽培技术要点及建园步骤，对绿色脐橙的定植、施肥、病虫的生物防治、采收及果实储藏等生产管理技术进行了探讨。     

柑桔中间砧的选择

利用柑桔的中间砧可克服嫁接不亲和性、矮化树体、增强枪林的抗性。目前，我国柑桔品种结构正进行大调整，一些相形见拙的品种（品系）如红桔、尾张、温州蜜柑、普通甜橙将被新推出的脐橙、特早熟、早熟温州蜜柑等通过高接换种所取代。被换接的品种（中间砧）对换接品种是否适宜，关系到产量、品质和经济效益。据研究，各品种适宜的中间砧是：（1）积砧温州蜜批冷问砧）换接脐橙、甜橙，表现早结果，丰产稳产，品质优。如尾张温州蜜柑高换朋娜脐橙、纽霍尔脐橙、丰脐、清家脐橙、白柳脐橙、大三岛脐橙、余佛林的脐橙、罗伯逊脐橙、哈姆林甜…     

沼肥配施复合肥对油茶生长及产量的影响

以8年生油茶林作为研究对象,采用随机区组试验设计,研究沼肥与复合肥不同施肥比例对油茶生长及结实的影响。结果表明:沼肥与复合肥配施能有效促进油茶树高、地径及冠幅面积增长,配施比例不同使油茶生长出现差异,其中处理3油茶树高、冠幅增长量最多,处理2油茶地径增长量最多;沼肥与复合肥配施能有效提高油茶单株冠幅面积产量,改善油茶果实经济性状,其中处理2油茶单株冠幅面积产量、干出籽率、果实干出仁率及种仁含油率高于其他处理;沼肥与复合肥配施能有效提高土壤有机质、速效养分及微量元素含量,其中处理2改善土壤肥力作用明显。综上,油茶成林按3︰1施用沼肥与复合肥,能有效促进油茶生长,提高油茶产量。     

脐橙炭疽病发生及其与环境因子关系调查初探

脐橙炭疽病首次在吉州区林业局果木试验场和兴桥镇长岭果园发现,对脐橙危害极大。该病主要危害脐橙的花、叶、枝、果。脐橙受害后,会引起落叶,枝梢枯死,枝干开裂,树势衰退,蒂枯落果,轻则影响果株生长发育,重则会造成秃株,甚至整株死亡。本文报道该病的症状、生物学特性、发生及其与气候、土壤、肥料、林龄及栽植方法等环境因子的关系,并提出对该病的防治意见和技术措施。     

学赣南脐橙产业发展理念促进赣南油茶产业发展

至2012年,经过40 a发展,赣南脐橙面积11.87万hm2,产量125万t,面积世界第一,年产量世界第三,成为全国最大的脐橙主产区,2012年8月评为全国驰名商标;赣南也是全国油茶老产区,2009年9月国家发改委、国家林业局确定的全国100个油茶示范基地县中,赣南有10个基地县,分别占全国10%,全省43.5%,这是赣南发展油茶的利好政策,大好机遇。借鉴赣南脐橙的发展理念,促进赣南油茶产业发展,通过5～8a的不断努力,力争“赣南茶油”评为驰名商标,富裕赣南农村、农民。     

Pest management based on petroleum spray oil in navel orange orchard in Ganzhou,South China

Comparisons between petroleum spray oil (PSO)-based pest management (pest management based on petroleum spray oil) and conventional pest management were made in a navel orange orchard from 2004 to 2005 in Ganzhou, Jiangxi province, South China. PSO-based management reduced chemical pesticide use and increased the species richness of natural enemies. To control the key pests below the economic threshold, PSO use, compared with chemical pesticide, reduced the cost of pest management. PSO had no negative effects on fruit yield and quality, and could form the basis of a practical and sustainable pest management program in navel orange. C. Chen and J. Zheng contributed equally to this work.     

不同柑橘品种对柑橘溃疡病的抗性调查

通过柑橘Citrus sp.4类10个品种对柑橘溃疡病Xanthomonas citri(Hasse)Dowson抗病性的调查发现，不同的柑橘品种对柑橘溃疡病的抗病程度有明显差异，甜橙类，脐橙类普遍容易感病，属高度感病品种：宽皮橘类的抗病性最强；而柚类感病轻重不一，以台湾白柚抗病性最强；而沙田柚抗病性较弱。     

杏鲍菇渣肥对雷竹林土壤有效养分的影响

在雷竹林传统施肥方式的基础上配施不同类型的有机肥(经发酵的杏鲍菇渣、鸭粪和猪粪),探究有机肥对土壤有效养分含量的影响。结果表明,施用3种有机肥的雷竹林耕作层(0~20 cm)土壤水解氮、速效磷、速效钾含量,均以施猪粪肥的为最高,施用杏鲍菇渣肥的土壤只有速效钾含量高于鸭粪肥,其他均低于鸭粪肥;不同有机肥类型对土壤氮、磷、钾等有效养分的改善效果存在季节差异。因此,当雷竹林地施用杏鲍菇渣肥时,可以增加鸭粪或猪粪有机肥用量配比,以增强土壤养分有效性的效果。     

土壤有机质与氮素供应的相关关系

土壤的氮素供应状况,对林木生长至关重要,该文就土壤有机质与氮素供应的相关关系进行了研究,结果表明,土壤全氮和速效氮的含量均与土壤有机质含量呈紧密的正相关关系。土壤中有机质含量的高低直接影响土壤氮素供应水平。     

不同施肥量对猕猴桃单果重及叶片直径的影响

实验结果显示,猕猴桃施肥量、单果重、叶片直径三因素呈现正相关关系。用线性回归法归纳出了猕猴桃施肥量与单果重、施肥量与叶片直径、单果重与叶片直径之间的一元回归方程,通过回归方程可以较早预测或估测猕猴桃单果重及果园施肥状况,以实现果园的科学管理。     

Comparative analysis of some selected macronutrients of soil in orange orchard and degraded forests in Chittagong Hill Tracts, Bangladesh

Status of organic carbon （C）, total nitrogen （N）, available potassium （K）, calcium （Ca） and phosphorus （P） in three different depths （0-5 cm, 5-15 cm and 15-30 cm） on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill. Tracts （CHTs） were evaluated and compared with those in degraded bush forests, through digging three profiles in each land use. The content of all the five nutrients was found to be higher in the soil of orange orchard than in the soil of forest. But the variation was not consistent for both the slopes. The content varied depth wise also, having the highest value in surface soil in case of both the land uses on both the slopes. A mean available K content was significantly higher in orange orchard than in forest on 55% slope, while it was lower on 35% slope. Surface soil contained the nutrients of K and Ca with the amount of 0.2905-mg·g^-1 soil and 3.025-mg·g^-1 soil respectively in the orchard, while 0.1934-mg·g^-1 soil and 1.6083-mg·g^-1 soil were respectively in the forest. Organic carbon and total nitrogen were found more or less similar in surface soil on both the land uses showing a slight difference. Available P was found only in orange orchard, and in forest it was too little in amount to detect by the spectrophotometer. The degraded forests were poor in nutrient content due to high rate of soil erosion, which would be possible to be improved by bringing it under tree cover as proved by the adaptation of orange orchard there.     

南京裂爪螨防治研究

福建省是我国毛竹主要产区 ,全省竹林面积 82 4万hm2 ,居全国第一。竹业是福建主要产业 ,是农村经济的重要组成 ,竹业发展的好坏关系到农村脱贫致富奔小康。福建省高度重视竹业发展 ,2 0 0 1年重点投资竹业开发二期示范工程 ,建设丰产示范基地。但近年来福建省毛竹林受到南京裂爪螨(Schizotetranychusnanjingensis)、竹缺爪螨 (Aponychuscorpuzae)严重危害 ,造成早期落叶 ,叶片焦黄似火烧状 ,竹笋产量大大降低 (张艳璇等 ,1 997a ;1 997b ;刘巧云等 ,2 0 0 0 ) ,制约了毛竹速生丰产示范基地建设。据调查 ,福建省毛竹害螨发生面积达 6 8万h…     

Interactions of soil predacious mites and citrus nematodes (parasitic and saprophytic), in citrus orchard under different regime of fertilizers. Effect on the population densities and citrus yield

Interaction of soil predacious mites and citrus nematodes (parasitic and saprophytic), in citrus orchard under different regime of fertilizers; Effect on the population densities and citrus yield.During a course of study on the predacious mites and their relationships with citrus nematodes, there were several population interactions, greatly varied according to the regime of fertilizers. In general the presence of organic manure encourage the population of predacious mites to increase, although decreasing the portion of organic manure discourage the populations. There were several positive interactions between both populations and that of predacious mites over exploited the nematode populations in several cases. Yield was almost the same under the different combinations, although the quality as measured by fruit size, weight/fruit, diameter/fruit and total solible solids was better under organic manure regime.