pruner是什么意思

用法例句

Effects of different pruning intensity on photosynthetic characters,growth and yield of crops in agroforestry;

修枝对复合农林系统内作物光合特性及生长的影响

Effects of pruning on soil fertility of Cunninghamia lanceolata plantation;

修枝对杉木幼林土壤肥力的影响初报

Effect of Pruning on Superior Family in Pinus taeda L. for pulpwood;

火炬松纸浆材优良家系人工林修枝效应

The result showed:(1) Technique of pruning to promote trunk extension could improve photosynthetic capacity and adaptive abilities of paulowniato deal with light surroundings.

采用Li-6400光合分析系统,对修枝接干和对照泡桐不同冠层、不同方位叶片在不同光量子密度条件下的净光合速率(Pn)进行测定,并采用经验方程对其光反应曲线进行拟合,结果表明:(1)修枝接干可明显提高泡桐植株总体的光合潜力和适应强光环境的能力,其最大光合速率(Pm ax)、光饱和点(LSP)、光补偿点(LCP)和光合幅度(PR)在修枝后分别达23。

Diameter at breast height(DBH) and single tree stem volume increment 5 years following treatments at age 9 years decreased significantly with pruning intensity increased.

选择修枝木,每年对其进行1次修枝,修枝强度为4种规定树干直径(6、8、10和12 cm)以下的所有枝条。

Control effects of pruning and thinning on Hemiberlesia pitysophila;

间伐修枝措施对松突圆蚧的控制效果