羊胚胎移植B超监测技术及其影像的研究

利用AMI-900型兽用B超,对羊胚胎移植进行了全程监测．主要包括供、受体羊选择前的普查,供体超排效果的监测,受体妊娠及胚胎发育监测,子宫、卵巢恢复状况监测等．根据所得资料和经验,总结出了羊胚胎移植中的B超监测技术及其声像图表现．     

名优百合的繁殖与复壮

以东方百合Ｃａｓａｂｌａｎｃａ的退化种球为实验材料,首先将鳞茎为内外层分别剥取,扦插基质为东北产硬杂木刨花和泥炭＋沙。外界条件下２０℃恒温避光和９～３０℃变温自然光。在变温自然光条件下,又分别采用不同浓度的ＡＢＴ生根粉处理。扦插１０２ｄ后的结果是：２０℃恒温避光条件下,无论基质如何,外层鳞片的扦插效果明显好于内层鳞片;ＡＢＴ生根粉有利于鳞片生根,而对于小鳞茎的发生有抑制作用;外层鳞片无论什么基质,     

A Preliminary Study on Dynamics and Models of N, P, K Absorption for High-Yield Cotton

The field experiments were carried out to investigate the dynamics and models of N, P and K ab-sorption for the cotton plants with a lint of 3 000 kg ha-1 in Xinjiang. The main results were as follows: Thecontents of N, P2O5, K2O in cotton leaves, stems, squares and bolls decreased obviously with the time over thewhole growth duration and the falling extent was greater in high-yield cotton than in CK. Contents of N inleaves, squares and bolls, in particular in the leaves of fruit-bearing shoot was higher in high-yield cotton thanin CK. Contents of P2O5 in squares and bolls and that of K2O in stems were higher in high-yield cotton than inCK during the whole growing period. The accumulations of N, P2O5 and K2O in the cotton plants could be de-scribed with a logistic curve equation. There was the fastest nutrient uptake at about 90 d for N, 92 d for P2O5and 85 d for K2O after emergence, respectively. Total nutrient accumulation of N, P2 O5 and K2O was 385.8,244.7 and 340.3 kg ha-1 , respectively. Approximately 12.5 kg N, 8.0 kg P2O5 and 11.1 kg K2O were neededfor producing 100 kg lint with the leaves and stems under the super high yield condition of 3 000 kg ha-1 inXinjiang.     

节能型日光温室冬季黄瓜栽培农艺措施优化研究

在吐鲁番市交河蔬菜开发基地的节能型日光温室中，采用二次通用旋转组合设计，３因素（密度、氮肥和磷肥）５水平实施方案．研究冬季黄瓜产量与几个重要因素及其各因素之间的相互关系。试验结果表明：密度７．１０～７．７３万株／ｈｍ２．氮肥４５１．７９～５０９．４５ｋｇ／ｈｍ２．磷肥２６３．３０～２８３．９９ｋｇ／ｈｍ２，４月份以前的产量在６０ｔ／ｈｍ２以上。     

数据库技术在海洋生物资源与生物栖息环境数据管理中的应用

讨论了如何建立和管理符合地理信息系统需要的海洋生物资源与生物栖息环境数据库。数据库采用Access开发平台，开发操作界面清晰明了，开发的功能有数据录入、导入、导出、查询、修改、汇总统计、打印等，系统界面用户可视化，清晰、直观地显示查询结果，其适用范围是针对海上勘测海洋生物资源与生物栖息环境的专业数据管理，能胜任数据库的日常维护与管理。同时介绍了数据库技术在数据管理中的作用。数据库在日后的海洋渔业资源与环境的研究、评价中必将得到广泛的应用。     

植物细胞生长周期中内外源细胞激动素的变化

应用细胞同步培养技术、高压液相色谱分析（ＨＰＬＣ）和酶偶联免疫法（ＥＬＩＳＡ）分析了胡萝卜细胞在悬浮培养时生长分裂周期的变化并对内源激动素类物质（玉米素Ｚ－Ｚｅａｔｉｎ、核糖基玉米素ＺＲ－ｚｅａｔｉｎｒｉｂｏｓｉｄｅ、二氢玉米素ＤＨＺ－ｄｉｈｙｄｒｏｚｅａｔｉｎ、核糖二氢玉米素ＤＨＺＲ－ｄｉｈｙｄｒｏｚｅａｔｉｎｒｉｂｏｓｉｄｅ、异戊烯基核糖基腺嘌呤ＩＰ－ｉｓｏｐｅｎｔｅｎｙｌａｄｅｎｉｎｅ和核糖基异戊烯基腺苷ＩＰＲ－ｉｓｏｐｅｎｔｅｎｙｌａｄｅｎｉｎｅｒｉｂｏｓｉｄｅ）含量进行定量分析．从用荧光显微技术分析ＤＮＡ含量变化结果看出，附加有激动素０．１×１０－６·Ｌ－１的悬浮液中，胡萝卜细胞的分裂周期为８．５ｈ，比不加外源激素的处理短１ｈ．在无外源激素存在的情况下，细胞分裂期中内源细胞分裂素类物质除ＺＲ之外，其余的Ｚ、ＤＨＺ、ＤＨＺＲ、ＩＰ和ＩＰＲ的含量在分裂的第６．５ｈ均有一个峰值出现，ＺＲ在第４．５和８．５ｈ有峰值出现．外加细胞分裂素的处理中．Ｚ、ｉＰ和ｉＰＲ整个周期无明显含量变化，ＤＨＺ和ＤＨＺＲ在第６．５ｈ出现峰值．ＺＲ在第８．５ｈ时也出现峰值．说明附加细胞激动素可协调Ｚ．ｉＰ和ｉＰＲ的积累，加速利用?     

矿区废弃地植被重建技术

总结了安太堡露天煤矿十余年来植被重建技术 ,具体包括种植密度与林草混交、直播与移栽、扦插与管理、植物的优化配置等 ,并对每种技术作了简要评价     

试论特早熟棉亚区棉花生产问题

结合新疆特早熟棉亚区的气候特点、植棉历史与现状，提出了该区在棉花品种选择上应突出早熟，抗病不是重点；栽培技术以促早熟为中心，近期应大力推广高密度、超宽膜，推行合理的作物布局及耕作制度，适当减少棉田面积；对病虫害实行综合防治等措施。     

Integrated control of agricultural tractors and implements: a review of potential opportunities relating to cultivation and crop establishment machinery

The quality of work and the output of a tractor-implement combination relies heavily upon the concentration and skill of the operator. Electronic systems are used increasingly to control tractor sub-systems, i.e. engine, transmission, implement hitch, external hydraulics, and driveline, and to monitor or control certain implements. However, current systems operate autonomously, relying entirely upon the operator for coordination. An integrated hierarchical control system could potentially monitor operating parameters pertinent to both the tractor and attached implements and use this information to control relevant tractor and implement sub-systems in a coordinated manner, thereby improving machine performance. Potential opportunities for the application of real-time, integrated, hierarchical control techniques to certain cultivation and crop establishment implements currently in use on European farms are reviewed. Specific implements (and their parameters) considered include primary cultivation machinery (control of working depth and working width), secondary cultivation machinery (control of working depth and seedbed quality) and crop establishment machinery (control of seeding depth and seed rate). Outline control strategies are proposed for these applications, and sensors and other hardware required to implement the control systems are identified. It is speculated that the agronomic and economic benefits which are likely to result from the implementation of the proposed technology, will enable economic justification of the proposed control systems in two to four operating seasons. These savings are likely to result from greater operational efficiency and more precise control of agronomic inputs.     

播期、播量和施氮水平对‘西农109’小麦生长及产量的影响

对在陕西省和安徽省审定的冬小麦品种西农109进行栽培技术措施探索,为其在关中地区乃至黄淮南片冬麦区的推广提供技术支撑。试验于2018-2020年在陕西省宝鸡市陇县的西北农林科技大学旱地农作物试验示范基地开展,通过探索不同播期、播量以及氮肥水平处理条件下对冬小麦西农109农艺性状和产量及品质的调控影响,综合分析得出：10月10日播种、157.5 kg/hm²的播量与144～168 kg/hm²氮肥水平栽培措施更适宜西农109小麦增产提质。