pear-tree西洋梨
pear r tree梨树
Small Pear-Tree Ditch小梨树沟
Pear-tree blossom in springtime rain梨花春雨
The Pear Tree梨子数;洋梨树;梨树酒店
pear tree Eceheare瑞士木
Bertha pear tree皮尔切丽
Blossoming Pear Tree开花梨树
pear-jujube tree梨枣树
Straw mulching enlarged the size of pear leaf, improved the proportion, the chlorophyll content and the chlorophy11 a/b of fresh pear leaf, thus improved photosynthesis of pear leaf,prompted the growth and development of pear tree.
秸秆覆盖不同程度地提高了梨树的单叶面积、鲜叶比重、叶绿素含量和叶绿素a／b比值，增强了树体的光合作用，促进树体生长发育。
参考来源 - 南方梨园秸秆覆盖综合效益研究