基于最值法和百分比法的开发区土地集约利用评价对比研究

以甘肃省34个省级开发区为例,通过构建评价指标体系,采用最值化和百分比法,对全省开发区土地集约利用评价进行定量分析。结果表明：最值法能增强评价指标间的显著性,真实反映开发区土地集约利用水平的差异;全省开发区产业用地投入产出效益、土地利用监管绩效较高,土地利用程度、用地结构状况和土地供应市场化程度较合理,但仍有进一步提升...     

寒地布利塔茄子越冬长季栽培

布利塔茄子是2011年黑龙江八一农垦大学从瑞克斯旺(中国)种子有限公司引进茄子品种,在日光温室进行越冬试验,表现丰产性好,抗病能力强,采收时间长的特点。2015年3月,通过了黑龙江省农作物品种审定委员会登记。该品种无限生长型,果实长形,单果重150g左右,果皮紫黑色,有光泽,绿色萼片,绿把,耐弱光。适宜在黑龙江省日光温室越冬栽培。根据品种特点和栽培条件,总结出适宜北方寒地日光温室茄子越冬长季生产的栽培技术,包括嫁接、播种育苗、定植、定植后管理、采收及病虫害防治等关键技术。     

烟草悬浮细胞系的构建

烟草既是一种重要的经济作物,也可作为良好的试验材料。以BY-2烟草为材料,进行悬浮细胞培养体系的构建。结果表明:不同激素和浓度配比处理对烟草愈伤组织诱导具有较大影响,愈伤组织最佳诱导配方为MS+3.0 mg/L 2,4-D+1.0 mg/L 6-BA+30 g/L蔗糖+15 g/L琼脂;当接种量为3 g/150 mL、转速为140 r/min、蔗糖浓度为3%,且配方为MS+3.0 mg/L 2,4-D+1.0 mg/L 6-BA时,悬浮细胞增殖最快,分散性最好,生长呈现"S"形规律,继代周期为8 d。     

羊瘤胃营养动物模型的探究

作为研究羊只营养代谢机理的重要手段,羊瘤胃营养动物模型的建立有着十分重要的意义。羊属于反刍动物,最主要的消化特点是有4个胃(分别是瘤胃、网胃、瓣胃和皱胃),能够利用纤维和非蛋白氮。单胃动物不能利用的纤维素和非蛋白氮在微生物的作用下可以被羊体所利用。同时,由于瘤胃微生物的作用,其他单胃动物可利用的蛋白氮和糖类也会发生     

代乳粉代替鲜牛奶对早期断奶犊牛生长及健康状况的影响

试验在天津梦得牧业发展有限公司、蓄驰奶牛养殖场开展,按照单因素对比试验设计原则,根据犊牛日龄、体重相近的原则,每试验场选取40头犊牛随机分为试验纽和对照纽,每组20头,犊牛单栏饲养。试验犊牛分别于出生1日龄、9日龄、21日龄、31日龄、41日龄、51日龄和61日龄清晨饲喂前空腹称重,测量胸围、体高,同时观察、记录各组犊牛采食量、死亡数和发病等情况。试验结果表明,犊牛30日龄前生长日增重试验组与对照组没有明显区别。试验组犊牛30～60日龄期间生长速度明显高于对照纽,差异显著（P〈0．05）,最高阶段达到800g以上。试验组犊牛0—60日龄胸围生长发育迅速,梦得奶牛场试验组犊牛平均增长显著高于对照组（P〈0．05）（22．35cm vs19．63cm）,蓄驰奶牛场试验组犊牛平均增长较对照组增加0．83cm,提高了4．4％。0～60日龄体高生长发育变化不大,试验组与对照组犊牛之间差异不显著。试验组较对照组发病率降低2．5个百分点．     

森泰除草剂在毛竹林中除草试验初报

通过对毛竹林使用森泰除草剂除草的对比试验，结果表明：浓度为22．5—45kg／hm^2森泰5％颗粒剂和浓度为1200．2400ml／hm^2森泰25％水可溶剂对试验地竹林内的芒萁有较强的杀灭作用，芒萁死亡率达99％以上，比对照41％农达高30％，对其他一些木本植物也有一定的杀灭效果。     

抗氧化剂对猪精液冷冻保存效果的影响

目前,猪的人工授精以鲜精和常温保存的液态精液为主,冷冻精液在人工授精中所占的比例不足1%,由于解冻后精子复苏率较低、异常精子多、受胎率低等原因,在生产上猪的精液冷冻与牛的精液冷冻相比尚未得到普遍推广、应用。精子的冷冻处理在畜牧业上是一个重要且具有特殊优势的操作过程。提高精子冷冻技术水平,需要对配子的生理学知识和精子收集、处理过程的生化改变有更深入的了解,这些     

88.8%草甘膦铵盐对杨梅园控草效果测定

利用88.8%草甘膦铵盐可溶性粉剂,对山地杨梅园主要杂草进行控草效果试验,分别采用有效含量1798g/hm2、3596g/hm2、5394g/hm2加水675kg/hm2喷雾,对蕨、杠板归、对白栎、空心莲子草等果园主要杂草控草效果75.5%～95.0%;对木本植物算盘子、檵木等有一定的控制效果。百草枯450mL/hm2、900mL/hm2、1350mL/hm2加水675kg/hm2喷雾,控草效果达64.8%～79.3%,但蕨的部分茎干尚未枯黄,不宜于控制蕨类杂草。88.8%草甘膦铵盐可溶性粉剂控草效果显著,可以在山地果园上推广应用。     

水稻育秧棚水果番茄浓缩栽培技术

介绍水稻育秧棚水果番茄栽培技术,包括品种选择、播种育苗、定植、定植后管理、采收及病虫害防治等关键技术。     

NaCl胁迫下沙枣幼苗的离子代谢特性

[Objective]To further understand the ion metabolism characteristics of Elaeagnus angustifolia L. under NaCl stress.[Method]The seedlings of two E. angustifolia L. provenances, which were Alaer (salt tolerance provenance) and Yinchuan (salt sensitive provenance), were treated by three NaCl concentrations (0,150,300 mmol·L^-1) and sampled at the 7th day and the 30th day to measure the Na⁺ , K⁺, Ca²⁺, and Mg²⁺ contents, K⁺/Na⁺ ratio and selective absorption and transportation of K⁺ in tissues (roots, stems and leaves). [Result]The results showed that the Na⁺ content in the organizations of E. angustifolia L. sharply increased with the increase of NaCl concentration. With prolonging of stress time, the Na⁺ content increased in roots, and decreased in stems and leaves. After seedlings of the two provenances were treated with 150 mmol·L^-1 NaCl for 7 days, the Na⁺ content was 2.10 times and 2.23 times in leaves, respectively, compared with the control groups, and was 1.79 times and 1.57 times in root. Meanwhile, the difference between two provenances showed a expanding trend with the increase of NaCl concentration and stress time. With the increase of NaCl concentration and extension of stress time, the K⁺ content, Ca²⁺ content and K⁺/Na⁺ ratio in organizations decreased gradually. Meanwhile, the Alaer provenance seedlings accumulated more Na⁺ in roots and less Na⁺ in leaves than that of Yinchuan provenance, and the K⁺ content, Ca²⁺ content and K⁺/Na⁺ ratio decreased less in the Alaer provenance seedlings than those of Yinchuan provenance. With the increase of NaCl concentration, the Mg²⁺ content in leaf gradually decrease, but the Mg²⁺ content in root increased 22.8~64.4% after salt stress for 7 days, and Alaer provenance seedlings increased more than Yinchuan provenance. After 30 days, there was non-significant difference with the control group on the Mg²⁺ content of root. K⁺ selective absorption of E. angustifolia L. seedlings significantly increased with increasing salt concentration of the media at the 7th days, whereas not obvious at the 30th days. When the concentration of NaCl in the media increased, the change of K⁺ selective transportation was not significant. [Conclusion]E. angustifolia L. seedlings increase Mg²⁺ content and K⁺ selective absorption in the roots at the early stage of salt stress to adapt saline environment. The salt-tolerance E. angustifolia L. provenance can cut off more Na⁺ in roots and reduce Na⁺ content in leaves, which cause less K⁺, Ca²⁺ and Mg²⁺ contents loss, especially the roots and leaves, so as to ensure that all kinds of metabolisms can go well.