排序方式: 共有9条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
以两优616为材料,采用两因素随机区组设计,研究不同栽培方式与氮肥水平对两优616产量及主要农艺性状的影响。结果表明,与常规栽培相比,宽窄行错位栽培可提高齐穗期和成熟期的叶面积指数(LAI),增加有效穗数和每穗总粒数,提高产量水平。在供试氮肥水平条件下,随施氮量的增加,宽窄行栽培的产量水平也显著增加;但在常规栽培条件下,过多施用氮肥,则不利于产量水平的提高。 相似文献
4.
5.
H. Furuita H. Ohta T. Unuma H. Tanaka H. Kagawa N. Suzuki T. Yamamoto 《Fish physiology and biochemistry》2003,29(1):37-46
This paper presents the relationship between egg quality and egg biochemical composition of cultured and wild Japanese eel, Anguilla japonica. Eggs were obtained by artificialinduction of maturation. Fertilization and hatching rates were used as characteristics of egg quality. Egg quality characteristics showed large variation; fertilization rate, 0–96; hatching rate, 0–84%. The biochemical composition also showed a large variation. There was no marked relationship between egg quality and fatty acid contents of eggs, except for n-6 highly unsaturated fatty acids (HUFA). Both the fertilization and hatching ratesincreased proportionally withincreases of the -tocopherol g(-Toc) contentin eggs. A more significant correlation was found between the amount of -Toc relative to the amount of HUFA and egg quality. The results of this study show that the egg quality of Japanese eel is affected by the –Toc level, andin particular, the ratio of -Toc to HUFAin the eggs.
Abbreviations: BHT – butylhydroxytoluene; EFA – essential fatty acids; FAME – fatty acid methyl esters; HPLC – high performance liquid chromatography; HUFA – highly unsaturated fatty acids; NADH – nicotinamide adenine dinucleotide; NADPH - nicotinamide adenine dinucleotide phosphate; ROS – reactive oxygen species; -Toc –-tocopherol. 相似文献
6.
7.
为了研究抗Ⅰ型糖尿病融合蛋白质基因HSP65-6×P277在植物中的表达,构建了含有融合基因HSP65-6×P277的植物表达载体pCAMBIA2301-HSP65-6×P277,通过农杆菌介导法将重组载体转入烟草,利用卡那霉素作为植物筛选标记,获得含有抗Ⅰ型糖尿病基因的16株转基因烟草植株。通过PCR、半定量RT-PCR及SDS-PAGE蛋白质电泳等方法检测,初步验证在抗性烟草植株中融合基因HSP65-6×P277在mRNA和蛋白质水平上进行了表达。 相似文献
8.
9.
杂交水稻两优932养分吸收特性及施肥效应 总被引:1,自引:0,他引:1
两系杂交中籼两优932具有超级杂交稻的产量潜力,米质较好.在湖北省南漳县对该品种进行效应函数法施肥试验,结果表明,①两优932在产量水平9 151 kg·hm-2的情形下,养分的吸收量为N290.21 kg·hm-2、P2O5 115.45 kg·hm-2、K2O405.76 kg·hm-2;N∶P∶K比为1:0.40:1.40;②对氮、磷、钾、硅的增产效果分别为30%、11.9%、11.5%和3.6%;③用肥料效应方程(^y)=a bx cx2求出每公顷经济施肥量为:氮170.91 kg、磷159.00 kg、钾179.33 kg;④株高、分蘖动态、有效穗数等生长性状受氮的影响很大,钾、磷次之;⑤穗长、单穗粒数、千粒重等产量性状则同时受3种营养元素的影响,其影响程度与施用的量之间的关系基本与肥料效应方程一致. 相似文献
1