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The natural distributing populations of the indigenous timber species--Cordia africana that grew in and around the area of Mizan Teferi in Ethiopia were investigated. Bulk seed samples were selected from ten phenotypically superior trees in different natural populations. They were evaluated through the performance of their half-sibs and especially examined for variability in seed morphometrics, seed germination, and seedling growth at nursery stage.

通过对埃塞俄比亚Mizan Teferi及周边地区生长的乡土用材树种--非洲破布木自然种群分布情况调查,筛选了10株生长表现型较好的优良母树,采集了大量的供试种子样品,并对其种子外部特征和在苗圃中的发芽率和种苗生长表现进行了观察和分析对比。

By contrast with the WPPM, the other treatments, especially the straw mulching, both of the root and the leafage can not get sufficient growth before July because of the low temperature, and after then, there was plentiful rainfall, so the leafage and stems still accumulated the assimilation products that should be distributed to ear. that led to the reductions of their economic outputs.The yield of maize covered with WPPM was the highest.

秸秆覆盖和露地的玉米在整个生育期内,尤其是秸秆覆盖,出现了各器官生长发育紊乱(如根系、根叶组等生长不充分和茎、穗叶组等过剩生长)的现象,导致了生育后期茎叶与穗争夺有限的光合产物,干物质积累不适时、分配不合理和最终经济产量的降低。

The results showed that the optimal temperature for the growth of BY-3 was 30~ 40℃. And the optimal pH was 6~6.5. Besides, the optimal cultivated time was 36~52 h. The favorite carbon source included maltase, sucrose, mannitol, glucose, lactose, and so on.

拮抗菌BY-3菌株的研究 2.1 拮抗菌BY-3菌株生长特性的测定本研究确定了不同的温度、pH、营养条件及盐浓度对菌株BY-3生长的影响,并对其生长曲线作了测定。

The optimum temperature for paramecium culture was 25 ℃ and optimum propagation temperature was 10-30 ℃. The growth condition of paramecium was better when the pH value was in the range of 5.0-10.0, but the optimum growth environment was neutral or near to alkalescence.

草履虫生长的最适温度是25℃,最适繁殖温度在1030℃。pH值在5.0~10.0的范围内,草履虫的生长状况都较好,但最适合于在中性略偏酸的环境中生长。

Through the investigation for the effect of the experimental parameters, such as the electrodeposition time, the voltage and the concentration of sodium dodecyl sulfate, on the shapes of dendrite-like copper crystals, the formation process was studied and it went through the nucleation, growth and revegetation process

通过研究各实验参数,如电沉积时间、电位和十二烷基硫酸钠的浓度对枝状晶体形貌的影响,发现枝晶铜的生长过程经历了成核-生长-再生长的过程。

The achievements of recent extensive experimental and theoretical researches on the morphological instabilities of eutectic and peritectic coupled growth were reviewed.

这些成果主要包括:片层共晶共生生长在最小过冷度下的超稳定性、片层共晶共生生长的Z字形分叉、熔体流动及非线性动力学对共生生长形态稳定性的影响等。

Significant interactions between pH and salinity, as well as pH and temperature were found during the germination respectively, otherwise the relationship between salinity and temperature was relatively unapparent.

结果表明, VPJ33的最优培养条件为:pH 8.41、温度34.1℃和盐度2.47%;菌体生长过程中, pH和盐度以及pH和温度对VPJ33生长的交互作用显著,盐度和温度对VPJ33生长的交互作用不显著。

Methods HOS cell line was treated with various concentrations of tretinoin in different durations in vitro. Proliferation suppression was observed by MTT method and invert microscope before and after tretinoin treatment, and protracting cell growth curve. The cell growth and invasion ability was measured with the colony-formation rate in soft agar test.

不同浓度的维甲酸作用HOS细胞,采用噻唑蓝法、倒置相差显微镜观察药物对细胞生长的影响并绘制细胞生长曲线;软琼脂集落形成实验观察细胞生长和侵袭能力的变化;流式细胞仪测定细胞周期变化。

In the highly undercooled melt, a roughening transition from the lateral to continuous growth mode was found.

在过冷 Al72Ni12Co16十面体准晶合金中发现沿十次轴方向的连续生长和沿二次轴方向的侧向生长的不同生长机制。

Stand in different growth period by weibull distribution function.(6) Height and diameter of a tree are two factors to show growth in upright and cross. When they are young, the ratio of height and diameter is more than 1. It shows the fact that natural stand, especially natural sprout forest grows fast in early period. Later, with the age increasing, the ratio of height and diameter gradually reduces. In nearly mature stand and mature stand, increment of diameter is over increment of height.

5树高和直径是表明林木纵向生长和横向生长的两个特征因子,在幼龄阶段,高径比大于1,说明天然林,尤其是天然萌生林早期高生长快的特点,此后随着年龄的增加,高径比逐渐减小,在近成熟或成熟阶段,直径生长量超过树高生长量。

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推荐网络例句

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。