在山东胶州对结缕草(Zoysia japonica)进行火烧和施氮肥试验。结果表明:火烧后结缕草提前1周返青,生殖枝数和抽穗率分别为2621/m2和28.26%,而对照为1178/m2和23.46%,二者差异极显著(P<0.01);火烧+施氮肥(秋季20 N/hm2+春季10 kg N/h...
详细信息
在山东胶州对结缕草(Zoysia japonica)进行火烧和施氮肥试验。结果表明:火烧后结缕草提前1周返青,生殖枝数和抽穗率分别为2621/m2和28.26%,而对照为1178/m2和23.46%,二者差异极显著(P<0.01);火烧+施氮肥(秋季20 N/hm2+春季10 kg N/hm2)生殖枝数和抽穗率显著高于火烧、不施肥;火烧极显著提高了种子数/生殖枝、结实率和种子产量(P<0.01),极显著降低了种子空瘪率(P<0.01),其中火烧+施氮肥效果最好;火烧使结缕草种子发芽势(发芽率)、发芽指数和活力指数均有极显著提高(P<0.01)。
The aim of the study was to investigate the immune effect of fusion protein VP4-STI. 40 mouse were randomly divided into 4 groups of test bacterin group （30 μg VP4-STI ＋0.6 μg LTB）, aluminiumhydroxide vaccine gro...
详细信息
The aim of the study was to investigate the immune effect of fusion protein VP4-STI. 40 mouse were randomly divided into 4 groups of test bacterin group （30 μg VP4-STI ＋0.6 μg LTB）, aluminiumhydroxide vaccine group （30 μg VP4-STI ＋Al（OH）3 gel ） , pure protein VP4- STI vaccine group （30μg VP4-STI ） and PBS control group were immunized by rhinal dripping. And then, the antibody levels of the mouse were determined. The protection effects of mouse in all immune groups were observed after the toxicity test with strong virulent strain C83902 of E. coli. Anti-VP4-STI antibodies were produced in other groups with the highest at the 6th week, except PBS control group. The antibody level in aluminiumhydroxide bactetin group was higher than that in test vaccine group. The antibody level in pure protein VP4-STI bacterin group was lower, being extremely significantly different from that in test vaccine group （ P 〈0. 001 ）. Mouse in test vaccine group and aluminium hydroxide bacterin group had better immuno-protection effect on strong virulent strain C83902 of E. coli, obviously different from that in PBS control group. The research provided basis for further improving the immunogeneticity of STI.
暂无评论