毛竹种子秋播育苗技术

系统地总结了毛竹种子秋播育苗一系列技术措施,为边远、缺苗、交通不便地区发展毛竹提供了一条有效途径。     

铁皮石斛无公害标准化种植技术及产品质量分析

【目的】明确铁皮石斛无公害标准化种植技术规程及产品质量标准。【方法】以野生＂红皮软脚＂铁皮石斛种质作为组培材料,探讨不同规格组培苗（优质、合格）、不同栽植方式（床架栽、地厢栽）对铁皮石斛生长势、生长量及成药茎条产量的影响,同时测定鲜茎和枫斗中石斛碱和石斛多糖的含量。【结果】不同栽植方式对铁皮石斛组培苗种植成活率影响不大,但优质苗栽后成活率、生长势和成药茎条产量均明显优于合格苗,床架栽的生长势、生长量和成药茎条产量均明显优于地厢栽;地厢栽产品中检测到部分有机磷农药残留,床架栽因远低于限量标准而未检出;1年生、2年生鲜茎及枫斗中石斛多糖含量分别为19.72%、18.54%、29.41%;在生长年限不超过2.5年范围内,石斛碱含量随种植年限增长而增加。【结论】在广西自然气候条件下,采用优质组培苗、搭床架栽植及生态防治病虫害是实现铁皮石斛无公害标准化种植的关键。实际生产中,可以鲜茎多糖含量≥18%、枫斗多糖含量≥25%、重金属和农药残留量不超过无公害食品规定标准作为无公害铁皮石斛产品质量鉴定指标。     

两系杂交稻Y两优1号的种植表现及高产栽培技术

Y两优1号是湖南杂交水稻研究中心培育成的两系杂交稻,在陆川县作双季稻种植,表现出产量高,抗性强,适应性广,品质优,生育期适中的特点。文章详细介绍Y两优1号示范种植表现及高产栽培技术。     

玉米套种指天椒高产栽培关键技术探讨

近年来,广西大力推广农作物间套种栽培技术,开创农业粮、钱双增收的新举措.文章针对当前玉米套种指天椒栽培技术存在的主要问题,提出高产栽培的几点关键技术.     

抗旱保水剂技术在玉米生产上的应用效果

为探索抗旱保水剂技术在玉米生产上的应用效果,2010年春季在广西那坡县特大旱灾玉米主产区进行抗旱保水剂技术在玉米生产的应用对比.结果表明,在相同干旱自然条件下,应用抗旱保水剂技术明显改善玉米生长农艺性状,与常规种植相比,增产21616.13kg/hm2,增产率为60.1%,经济效益提高2223.95元/hm2.     

无铅鸡蛋皮蛋腌制工艺的优化

以鸡蛋为原料,采用纸包法工艺,单因素试验探讨金属离子浓度、NaOH浓度、NaCl浓度和腌制温度对皮蛋成品质量的影响,并通过正交试验优化得到鸡蛋皮蛋的腌制工艺为：腌制温度为20～25℃,NaOH浓度为5.5%,NaCl浓度为4.5%,金属离子浓度为0.1% Zn2++0.1% Cu2++0.1% Fe2+。     

浙江省发展农业技术创新战略联盟的需求诱因及对策

农业技术创新战略联盟能够有效整合农业产业技术创新资源,引导创新要素向企业集聚,是促进产业技术集成创新、有力提升产业核心竞争力的组织形式。文章以浙江为例,基于农业技术创新战略联盟发展的战略背景,通过分析发展农业技术创新战略联盟的需求诱因及其发展现状与存在的主要问题,提出浙江发展农业技术战略联盟的总体思路与促进农业技术战略联盟发展壮大的对策建议。     

胡柚果醋的发酵工艺研究

胡柚是浙江的特色杂柑,果实营养丰富,口感独特,极耐储藏,是非常适宜加工的柑桔品种。文章以出汁率适中的胡柚小果为原料,采用气相色谱测定发酵液中的酒精和醋酸含量,研究胡柚果醋的发酵工艺。确定以安琪酵母股份有限公司的葡萄酒酵母为菌种进行酒精发酵,其适宜温度为28℃,发酵时间为72 h。确定来源于自然发酵胡柚果醋的巴氏醋杆菌HY05为菌种,以浅层液体方式进行醋酸发酵,其适宜的液面深度为3 cm;适宜温度为30℃,时间为72 h;发酵液过滤,所得原果醋密封后置于20℃避光处陈酿25 d,过滤、灌装、封口后于70℃灭菌10 min,所得胡柚果醋特色风味突出。     

An innovative tapping system, the double cut alternative, to improve the yield of Hevea brasiliensis in Thai rubber plantations

In Thailand, the continuous decrease in the size of rubber plantations has led to the general adoption of intensive tapping systems which may lead to over harvesting, high rates of tapping panel dryness (TPD), short life-cycles of the plantations, and low labour productivity. In Thailand, farmers use a half-spiral downward tapping system (S/2) or a one third-spiral (S/3) with a tapping frequency of once two days (d2) or more. To increase productivity, it is difficult to reduce tapping frequencies, even with ethylene stimulation, as this would result in days without work for tappers. The purpose of this study was to characterize the behaviour of the Hevea latex yield under the double cut alternative tapping system (DCA). The aim was ensure the long-term sustainability of latex yield by increasing the time required for latex regeneration between two tappings through splitting this high tapping intensity (100% or above) into two different tapping cuts tapped alternately (S/2 d47d7(t,t). Over a period of 10 years, compared to a single cut tapping system (S/2 d2) of equivalent intensity, DCA increased cumulative rubber production by 9%. Ability of the trees to produce more latex under DCA was related to the sucrose and inorganic phosphorus contents of the latex cells in each tapping panel. DCA produced metabolic activity more favourable to yield during the first 10 years of tapping. But DCA also resulted in higher TPD rates, a sign of a metabolic dysfunction of the productive bark. DCA is a new tapping system. Further research is required to optimize the use of the DCA strategy. Such research will lead to new advances in our knowledge of the physiology of the rubber tree, mainly at the trunk scale.     

Whole farm implications on the application of variable rate technology to every cropped field

In the last 10 years precision agriculture has evolved and it is now possible to manage cropping inputs at the sub field scale. However, the expected return generated by these management practices varies with the amount and predictability of the spatial variation in crop yield across the field and may vary from field to field across the farm. We analysed the spatial variation of crop yield from 20 fields totalling 2832 ha from a 5200 ha farm in Western Australia at the field and the sub field scale to determine the economic value of introducing variable rate management (VRT) strategies to fields across the entire farm. In this case study, 6 out of 20 fields generated an additional economic payoff of AU$15/ha when managed with VRT over uniform management. Sensitivity analysis found that the starting levels of soil fertility were an important driver of the payoff for managing a field with VRT. If starting soil fertility was low and uniform across the field, then no fields generated an economic return of more than AU$7.00/ha when managed with VRT. Other factors, including commodity price, fertiliser price, amount of variation in crop yield within the field moderately increased the value of adopting VRT across fields within farm the value of VRT increased if fertiliser budgets were constrained, particularly if the yield distribution of the field was negatively skewed. While VRT does add value to many fields across the farm, the gains are small and the technology must be implemented cheaply for it to be viable.