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该项目由扬中市农业技术推广站承担完成,课题组研究形成了省工、省力与精确定量有机结合的水稻机插秧高产栽培技术体系;总结出机插秧条件下单产9750kg/hm~2的壮秧、基本苗、群体质量等农艺指标,以及快速培肥、定量播栽、沉浆、水插,科学肥水运筹等关键配套技术措施,形成了水稻机插秧无公害生产技术规程。 课题组坚持试验研究与示范推广相结合,3年推广应用面积达7533hm~2,增产289.5 kg/hm~2。省工 相似文献
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该项目由扬中市农业技术推广站承担完成,课题组研究形成了省工、省力与精确定量有机结合的水稻机插秧高产栽培技术体系;总结出机插秧条件下单产9750kg/hm^2的壮秧、基本苗、群体质量等农艺指标,以及快速培肥、定量播栽、沉浆、水插,科学肥水运筹等关键配套技术措施,形成了水稻机插秧无公害生产技术规程.…… 相似文献
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机插秧技术是一项省工、高效、节种、节本、增产的栽培技术,是一项农机与农艺密切结合的成熟技术.在整个机插秧工作中,育秧是最为关键的一环,育好适合机插的壮秧,机插秧工作就完成了一大半. 相似文献
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为了解水稻机插秧、人工手插秧、旱育抛秧以及直播稻4种不同栽培方式对水稻产量的影响,为推广科学的种植方法提供理论依据。今年在灌南县农业综合展示基地进行这4种不同栽培方式的试验。最终旱育抛秧产量为1.06万kg/hm2,人工插秧产量为1.03万kg/hm2、水稻机插秧产量为0.96万kg/hm2、直播稻产量为0.79万kg/hm2,结果表明水稻在旱育抛秧栽培方式下产量最高。 相似文献
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为了了解水稻机插秧、人工插秧和人工抛秧3种不同插秧方式对水稻产量的影响,为推广科学的种植方法提供理论依据.本县农机局通过用3种不同插秧方式在相邻稻田种植相同水稻品种各1亩,进行相同的管理,观察其生长情况,追踪其生长过程,统计数据,同时收割,测各自产量比较分析.最终得到水稻机插秧亩产565.5kg、人工插秧亩产530.1kg、人工抛秧亩产524.1kg,水稻机插秧亩产比人工插秧亩产高出6.68%、比人工抛秧亩产高出7.9%.水稻机插秧亩产最高,应大力鼓励农民联合购置插秧机,推广科学的机械化插秧方式,提高水稻产量. 相似文献
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为解决水稻机插秧育秧方式中秧盘拌浆泥和播种分开作业的问题,国内首次实现了使用大田浆泥作育秧基质,在一台播种机上一次完成放秧盘、施壮秧剂、链条输送大田浆泥、浆泥除杂、灌浆泥,以及播种等全部作业过程。根据水稻播种的技术要求标准进行整机结构设计,并采用田间试验实测法对播种机的播种性能进行测试。采用杂交水稻和常规水稻两种类型的种子进行田间育秧试验,结果表明:播种效率为1 200盘/h,杂交水稻667m~2种子用量1.5kg,平均每块秧盘用种75g,每盘秧苗2 357.3株,发芽率85.99%,成秧率87%;常规优质稻667m~2种子用量2.5kg,平均每块秧盘用种125g,每盘秧苗4 172株,发芽率85.96%,成秧率86.98%;每秧盘和总的播种均匀度达93%以上,取样格粒数合格率均≥85%;大田机插秧漏插蔸率4.50%,作业成本比工厂化育秧节约了4.67元/hm~2。田间试验过程中机器性能稳定、作业流畅、经济性好,各项指标均达到行业标准和生产实际要求。 相似文献
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对水稻机插秧的生育特性及关键技术的初步认识 总被引:3,自引:0,他引:3
2001年,句容市分别在华阳镇、后白镇、郭庄镇示范水稻机械插秧共计6.35 hm2,获得了较大的成功。回顾一年来的示范推广及栽培技术应用实践,我们对水稻机插秧在本市推广应用的基本表现、生育特性及关键技术的初步认识如下:1 基本表现及评价1.1 增产作用 机插秧水稻经成熟期考察和实收产量统计,平均理论单产11433kg/hm2,实收单产10281kg/hm2,分别比相邻的手插秧增长1546.5kg和1200kg,增幅分别为15.6%和13.2%,比全市实收平均单产增1596kg,增幅18.4%,其增产作用与效果显著。1.2 增收效果 根据三个镇试点统计,每hm2机插秧育秧成本1053… 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献