Within the tree height, there was a trend for pollen density to increase with height.
在树高范围内，花粉浓度有由下至上增加的趋势；
The pollen density of different direction is affected by the main wind direction, 58.07% of pollen comes from the main wind direction.
不同方位的花粉密度受主风频率影响，主风方向花粉密度占58.07%。
The pollen density of different direction was affected by the main wind direction, 58.07% of pollen came from the main wind direction.
不同方位的花粉密度受主风频率影响，主风方向花粉密度占58.07%。
The pollen viability by using different culture method had differences and there were a certain correlation between the pollen density and pollen viability.
用不同的培养方式时棕榈花粉生活力存在差异，花粉培养密度与花粉生活力存在一定相关性；
Making use of the culture techniques to regulate the heading date and the pollen density are very important to increase the seed yield of the seed production in the hybrid rice.
利用栽培技术来调节花期和花粉密度，对提高制种产量有重要作用。
Effects of AC and anther density on pollen embryo and callus production and green plant regeneration were studied in a filter-sterilized, liquid-medium culture system.
在过滤灭菌的液体培养体系中研究了甘露醇预培养和诱导培养过程中活性碳和花药密度对大麦花培效率的影响。
Results:A close correlation between airborne allergic pollen in distribution, density, change of season and respiratory allergical diseases has been found.
致敏花粉量最多的季节也是呼吸道变态反应发病最高的季节。
The result showed that the induction frequency of pollen callus was irrelevant to the volume of culture containers, and highly related to the density of pollens.
结果表明，小麦花药培养中的愈伤组织诱导效率与培养容器大小无关，与花药接种密度显著相关 ；
The result showed that the induction frequency of pollen callus was irrelevant to the volume of culture containers, and highly related to the density of pollens.
结果表明，小麦花药培养中的愈伤组织诱导效率与培养容器大小无关，与花药接种密度显著相关 ；
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