日光温室秋冬茬水果彩椒营养液循环栽培技术

为更好探索秋冬茬盆栽彩椒栽培技术,昌平区农业技术推广站示范了椰糠盆栽彩椒营养液循环栽培生产模式。采用自动灌溉、合理的水肥配比、回流液回收利用及栽培管理技术,其中栽培技术内容包括品种选择、培育壮苗、定植及管理、授粉、植株调整、病虫害防治等,实现水肥配比合理化,节省人工;肥效较高,水肥循环利用率达90%,节水50%以上;使作物生长健壮、抗病力强,施药次数减少;667 m~2产量达5 570 kg,比传统栽培模式提高20%,社会、经济和生态效益显著。     

深液流管道水培系统的研制

介绍了小型化深液流管道水培系统的结构、制作方法、管理技术及栽培效果.试验表明,用该系统栽培叶用莴苣,单株鲜重206.7 g,株高22.78 cm,茎粗12.1 mm,展度31.44 cm,叶面积391.20 cm2,叶片数22.5片;栽培红梗叶恭菜,单株鲜重402.7 g,株高36.24 cm,茎粗29.5 mm,展度41.45 cm,叶面积634.23 cm2,叶片数18.5片;栽培落葵,单株鲜重193.5 g,根重86.2 g,根长30.33 cm,叶片数11.5片,株高45.62 cm,展度33.26 cm,叶面积为302.15 cm2.栽培效果均明显优于当前室内园艺常用的静止箱式水培和复合基质箱培装置.     

混菌发酵生产富肽蛋白饲料工艺条件的研究

利用枯草芽胞杆菌和产朊假丝酵母菌混合发酵生产富肽蛋白饲料,通过单因素和响应面分析试验对其工艺条件进行了研究,选择接菌比例(枯草芽胞杆菌:产朊假丝酵母)为3:1,发酵36h。最佳发酵条件为:发酵温度33℃,装料量40g,原料初始含水率为62%,拌料水的pH值为自来水的自然pH值。在此条件下测得三氯乙酸可溶性氮(TCA-NSI)含量达到33.61%。     

辣椒有机生态型无土栽培本土化集成技术研究

进行了双孢菇残料有机-无机复合基质配方和低成本栽培槽的筛选,并研究了辣椒有机生态型无土栽培管理技术。试验结果表明,以双孢菇栽培残料等为原料的最佳基质配方为双孢菇渣∶羊粪∶炉渣∶细河沙=15∶6∶8∶6(体积比);地下式栽培槽成本低廉、建造简单,667 m2建造成本为3 618元,较地上式和半地下式栽培槽节约成本4 254元和1 418元;其栽培管理采用节水灌溉、长效施肥,全生育期用水79.7 m3/667 m2,比土壤栽培节水62.8%,施肥成本比营养液降低68.4%。     

可动式螺旋立体花架系统的设计

为了提高花卉栽培中的阳台、庭院利用率，满足家庭养花的需要．作者设计了一种可动式螺旋立体花卉栽培装置，它由中央立柱、螺旋式栽培钵、营养液加液系统及定时控制系统所组成，具有美观、小巧的特点，自动浇水，可以转动，便于装拆。设计了全新的一体式螺旋式栽培钵．彻底改变了传统立柱栽培的串装盆钵形式，更加适宜宇家庭养花和公共环境的美化，具有广泛的市场前景。     

Soilless culture in China

Soilless culture in China has developed rapidly in recent years.The aree of soilless culture in China was about 0. 1 ha in 1985,but in 2002 the area reached to 865 ha. This paper introduced the brief history of soilless culture in China, and the main soilless culture systems. The present situation and problems are also discussed in this paper.     

设施无土栽培营养液中植物毒性物质的去除方法

总结了闭路无土栽培技术在国际上的研究进展和应用现状,分析连续栽培过程中营养液中常有植物毒性物质积累的原因,并综述了去除营养液中植物毒性物质方法的研究进展。     

无土基质对江南盆栽牡丹生长的影响研究

为了筛选适合牡丹生长的无土栽培基质，以赵粉牡丹品种为试验材料，选用4种基质材料，按照一定比例配成4种栽培基质配方，研究其对江南盆栽牡丹花径、新枝和复叶长度及成花率的影响。结果表明：G2配方（蜂窝煤渣：菇渣：珍珠岩一2：1：1）处理的平均花径、平均新枝和复叶长度最长，成花率最高，价格低廉，并且其基质疏松，透气性好，氮磷钾含量高，是肉质根的牡丹较为理想的基质配方，完全可以在生产中代替价格较贵的泥炭，起到降低生产成本，提高经济效益的作用。     

无土栽培香荚兰叶片营养状况分析

对无土栽培香荚兰叶片的营养状况进行测试分析。结果表明：施用不同配方营养液的香荚兰各养分含量也不同。施用A3营养液和对照A5的香荚兰叶片N素含量在适宜范围内，而施用A1、A2和A4营养液的香荚兰叶片N素缺乏；除施用对照A5的香荚兰叶片K素缺乏外，施用其余4种营养液配方K素存在高量；施用所有配方营养液的香荚兰叶片的P素、Ca素和Mg素均为缺乏，其中Ca、Mg缺乏非常严重。各营养液配方下的香荚兰叶片养分之间比例严重失衡。从养分含量方面分析，以A3营养液配方为基础，进行营养液配方调整比较适宜；从养分平衡状况来看，     

Effect of mixing and sampling method on pelleted feed nutrient analysis and diet formulation validation

Samples of pelleted feed may be taken during manufacturing and analyzed for nutrient content in order to estimate if nutrients are in accordance with diet formulation. The objective of this study was to determine the impact of mix time, sample location, sample number, and sample blending technique on analyzed nutrients. Ingredients were mixed in a single screw vertical mixer for 30 s or 10 minutes. Samples were taken post extrusion from the pellet die as hot pellets or post cooling and conveyance as finished feed. Two or 10 samples were collected at equally spaced time intervals and pooled. Subsamples were obtained by blending pooled samples by hand or using a sample splitting device. Proximate and supplemental amino acid analysis was determined on each blended subsample and standardized for moisture content. Crude fat and free supplemental DL-methionine were affected by mix time (P < 0.05). The 10-minute mix time produced crude fat and free supplemental DL-methionine that had lower and higher values, respectively, compared to the 30-second mix time and agreed more with the calculated nutrient profile and diet formulation. Free supplemental DL-methionine was also affected by sampling location (P < 0.05). Samples obtained at the pellet die were higher and agreed more with diet formulation compared to finished feed samples. Analysis of free supplemental DL-methionine from samples obtained at the pellet die may best indicate pelleted diet homogeneity and validate the diet formulation.