固氮的

Effects of boron on the growth, nutrition quality and nitrogen-fixing ability were studied in Chamaecrista rotundifolia. Compared with the control, the branch numbers, root and shoot biomass of C.

设立田间小区试验，探讨在红壤中施用不同浓度的硼肥对圆叶决明植株生长、牧草品质和根瘤固氮能力的影响。

Effects of boron on the growth, nutrition quality and nitrogen-fixing ability were studied in Chamaecrista rotundifolia. Compared with control,the branching numbers, root and shoot biomass of C.

设立田间小区试验，探讨在红壤中施用不同浓度的硼肥对圆叶决明植株生长、牧草品质和根瘤固氮能力的影响。

The biological N-fixation rate of Chamaecrista rotundifolia showed a trend of increasing and then decreasing, climbing to the peak of 29.50% at the N2 level (30 mg/kg) and then gradually decreasing, had a highly significant difference between the treatments. At a certain N level, the N absorption of C.

结果表明：圆叶决明生物固氮百分率随着施氮水平的增加呈先升高后下降的趋势，并在N2（30 mg/kg）水平下达到最高，为29.50％，之后逐渐下降，且各处理间差异极显著。

After the selection from one to three generations, several mutants were obtained. The major mutants included non-nodule mutants (18 lines) which failed to nodulate after inoculated with rhizobia for two weeks, ineffective nodulation mutants (9 lines) which had less uneven and white or transparent nodules, an abnormal leaf and flower mutant which was dwarf without stipules, abnormal flowers and less nodules, and a slender mutant with a thin stem and smaller leaves.

从种植的三代植株中，筛选到多种共生固氮根瘤的突变体，其中不结根瘤突变体18个株系，表现为接种根瘤菌两周后无根瘤形成；结无效根瘤突变体9个株系，表现为根瘤数目少且分布不均匀，根瘤呈白色，有些为半透明；花叶形态异常突变体1个株系，表现为除根瘤数目少外，植株矮小、托叶消失、花形态异常；纤细突变体1个株系，表现为除根瘤数目少外，植株变小、茎细叶小。

Sinorhizobium fredii 042BS was isolated from root nodules of alfalfa from Xinjiang Region. Nodulation experiments showed that both soybean and alfalfa were nodulated by 042BS effectively.

费氏中华根瘤菌042BS分离自新疆的苜蓿根瘤，交叉结瘤试验发现它既可以在苜蓿上又能在大豆上结瘤固氮。16S rDNA PCR-RFLP分析表明，042BS与费氏中华根瘤菌模式菌株USDA205的4种限制性酶切图谱完全一致。

Roger and co-authors （1992） compiled data from more than 100 inoculation trials （ Table 5）, that indicate that on average, Azospirillum inocula have not been beneficial to rice crop yield.

Roger 和他的合作者（1992）整理了100多个接种试验的数据，认为固氮螺菌接种剂在总体上对水稻产量没有作用。

Research areas include biological nitrogen fixation in sustainable production, nutritional value of clover and grass, plant pathogens and overwintering problems, feeding hygiene etc.

研究领域包括可持续生产的生物固氮作用、苜蓿和草的营养价值、植物病原体和越冬问题以及饲养卫生学等。

Research areas include biological nitrogen fixation in sustainable production, nutritional value of clover and grass, plant pathogens and overwintering problems, feeding hygiene etc.

研究领域包括可持续生？？？？的生物固氮作用、苜蓿和草的营养价值、植物病原体和越冬问题以及饲养卫生学等。

Impact onto metabolic adaptation in bacteroids, gene expression profiles were determined under either nifA

仅有196 个基因的表达发生变化。nifA 基因突变后受到影响基因的不仅与共生固氮相关，还与系统

The effects of MJ on the basic characteristics of the nodulation and nitrogen fixation of soybeanThe point of the noduation initialized was at the 7th day after germination of the seed within the 22?

MJ对大豆结瘤固氮基本特性的影响在22～32℃的温度条件下，大豆结瘤时间约在种子萌发后7d。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。