氮肥运筹对抛秧栽培晚稻物质积累及产量的影响

在总施氮(纯氮)量为180kg/hm2的条件下,研究不同施氮时期对秀水79物质积累和分配及与产量形成的影响。结果表明:最高分蘖数随前期施氮比例的减小呈下降的趋势,氮肥后移有利于成穗率的提高,延长生育期。产量侧重后期施氮处理的产量较生育后期不施氮处理的产量明显提高,按基肥、分蘖肥、穗肥之比为5:3:2施氮方式产量最高,比对照增稻谷3800.0kg/hm2,增产85.15%。氮素的生产力随着基肥施用量的增加有下降趋势。在不同施氮比例下,对有效穗和结实率有显著的影响,而对穗实粒数和千粒重差异不大,因而适当氮肥后移在保证颖花数的前提下,延长剑叶生长时间,防止叶片早衰,可以提高结实率和千粒重而增加产量。     

爆裂型玉米抽雄后期叶序列特性的研究

爆裂型玉米抽雄后期叶序列特性研究结果表明，玉米叶长、宽及干物重从倒１叶开始依次递升、至果穗叶层达到峰值后，再缓慢下降。叶绿素含量各叶位虽有一定的差异，但无明显规律；分析叶绿素ａ及ｂ的比值，果穗叶层最低。就叶片内叶肉细胞环数而言，低叶位和高叶位的叶片低环数的叶肉细胞比例相对较高，而高环数的叶肉细胞比例较低，果穗叶层六环以上的叶肉细胞比例较高；单位面积上气孔数目具同样规律。     

The Influence of Co-Suppressing Tomato 1-Aminocyclopropane-1-Carboxylic Acid Oxidase Ⅰ on the Expression of Fruit Ripening-Related and Pathogenesis-Related Protein Genes

The purpose of this study is to explore the influence of co-suppressing tomato ACC oxidase Ⅰ on the expression of fruit ripening-related and pathogenesis-related protein genes, and on the biosynthesis of endogenous ethylene and storage ability of fruits. Specific fragments of several fruit ripening-related and pathogenesis-related protein genes from tomato （Lycopersicon esculentum） were cloned, such as the l-aminocyclopropane-1-carboxylic acid oxidase 1 gene （LeAC01）, 1- aminocyclopropane-l-carboxylic acid oxidase 3 gene （LeAC03）, EIN3-binding F-box 1 gene （LeEBF1）, pathogenesis-related protein 1 gene （LePR1）, pathogenesis-related protein 5 gene （LePR5）, and pathogenesis-related protein osmotin precursor gene （LeNP24） by PCR or RT-PCR. Then these specific DNA fragments were used as probes to hybridize with the total RNAs extracted from the wild type tomato Ailsa Craig （AC＋＋） and the LeAC01 co-suppression tomatoes （V1187 and T4B）, respectively. At the same time, ethylene production measurement and storage experiment of tomato fruits were carded out. The hybridization results indicated that the expression of fruit ripening-related genes such as LeACO3 and LeEBF1, and pathogenesis-related protein genes such as LePR1, LePR5, and LeNP24, were reduced sharply, and the ethylene production in the fruits, wounded leaves decreased and the storage time of ripening fruits was prolonged, when the expression of LeACO1 gene in the transgenic tomato was suppressed. In the co-suppression tomatoes, the expression of fruit ripening-related and pathogenesis-related protein genes were restrained at different degrees, the biosynthesis of endogenous ethylene decreased and the storage ability of tomato fruits increased.     

氮肥和高温对早稻淦鑫203产量、SPAD值及可溶性糖含量的影响

为探究氮肥和幼穗分化后期高温对水稻产量的综合影响,以杂交稻淦鑫203为材料,设置2个氮肥水平,于水稻幼穗分化后期37 °C高温处理4d,研究氮肥和穗分化后期高温对早稻产量、SPAD值及可溶性糖含量的影响.结果表明,高氮或是常氮下,与适温相比,高温降低了淦鑫203的结实率、单茎产量、SPAD值和可溶性糖含量.高温或适温下,与常氮相比,高氮增加了结实率、单茎产量和可溶性糖含量.高温高氮的结实率、单茎产量和单株产量高于高温常氮,说明适当增施氮肥可缓解高温的减产作用.     

早熟板栗新品种‘岱岳早丰’

 ‘岱岳早丰’是从泰山板栗实生后代群体中选育出的新品种。早熟,优质,丰产,耐瘠薄。坚果光亮整齐,中大粒,果肉细腻,糯性强。适宜在泰沂山区的山地、丘陵和胶东山地栽培。     

早熟梨新品种-早金酥的选育

早金酥是以早酥为母本,金水酥为父本杂交育出的梨早熟新品种.果实呈纺锤形,平均单果质量240 g,最大质量600 g;果面绿黄色,果皮薄,肉质脆,果汁多,风味酸甜,石细胞少,品质极上.可溶性固形物含量10.8%,总糖含量8343 g·kg-1,可滴定酸含量2.527 g·L-1,维生素C含量33.72 mg·kg-1,硬...     

朔州地区早熟马铃薯品种比较试验

对朔州地区引进的3个早熟马铃薯品种进行比较试验,结果表明,3个品种间差异达到显著水平。以早大白产量最高,比对照费乌瑞它增产28.00%,且综合性状良好。由于上市早,价格高,农民可取得良好的经济效益。     

细胞因子对小尾寒羊胎盘成熟的影响

为了研究细胞因子对小尾寒羊胎盘成熟的影响 ,本实验采用液相竞争法和平衡法 ,对小尾寒羊空怀期 (n=5 )和妊娠期 (n=13)第 85天、10 5天、12 5天、14 0天和 15 0天 (足月 )时的血清白细胞介素 - 1β(IL - 1β)、白细胞介素 - 6 (IL - 6 )和肿瘤坏死因子(TNF)的含量分别进行检测。结果表明 ,IL - 1β和 IL - 6含量在 12 5天时与对照组间差异极显著 (P<0 .0 1) ,TNF含量在各时期与对照组差异均显著 (P<0 .0 1或 P<0 .0 5 )。随着妊娠过程的进展 ,三种细胞因子含量逐渐增加 ,12 5天时达到最高值 ,分别为 0 .390± 0 .196 ng/ ml,5 79.8± 15 2 .8pg/ ml和 2 .348± 0 .396 ng/ ml。而后逐渐下降 ,到足月前略有回升 ,但仍低于 12 5天时的最高值。由此看出小尾寒羊在妊娠期间 ,细胞因子与妊娠之间有着密切的关系 ,前者对于维持妊娠起到重要作用。由于 14 0天至足月3种细胞因子基本稳定 ,这表明胎盘于 14 0天左右达到成熟 ,IL- 1β和 IL- 6与启动分娩有关 ,而 TNF可能参与小尾寒羊分娩的启动。     

番茄成熟突变体rin基因的AFLP分子标记

研究以番茄成熟突变体品种07905和正常成熟品种07009为亲本材料,分析鉴定了其F1代及F2代分离群体各单株在完熟期果实的成熟表现。结果表明,番茄成熟突变体rin基因所控制的性状是单隐性遗传性状。用1 024对引物对2个亲本及F2代分离群体进行AFLP分析,得到4个与番茄成熟突变体rin基因紧密连锁的标记,分别为E51M81-B、E46M37-F、E32M33-A和E60M81-E,与突变体rin基因的连锁遗传距离分别为4.9、8.8、10.9和12.5 cM。