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以“温185”核桃为试材,设置不同梯度光照处理,研究了不同光照处理对叶片生理指标及叶片解剖结构的影响,以探究农业生产中核桃乔化密植枝条叶片相互遮阴对树体造成的影响。结果表明:43%光照条件短时间会提高叶片中Chl(a+b)的含量;当光照低于69%透光率时,对核桃树长时间遮阴会抑制Chl(a+b)的合成,84%的光照条件可以促进Chl(a+b)的合成;各遮阴处理下的脯氨酸含量极显著低于全光照条件;遮阴处理可以提高叶片水势、丙二醛,且二者随着遮阴程度的增加而增加;84%光照处理下的叶片气孔长度、气孔面积显著高于对照,但随着遮阴程度的加重,叶片表皮细胞长度、上下表皮厚度、海绵、栅栏组织厚度、海/栅、气孔密度、气孔面积均降低,气孔长度变大。试验表明,43%光照短时间遮阴不会对核桃产生影响;当光照低于69%时,长时间遮阴会对核桃生长产生影响,84%光照对核桃生长具有一定的促进作用。
In order to explore the effects of different light treatments on physiological indices and leaf anatomical structure of leaves, the “Wen 185 ” walnut was used as experimental material to study the effects of different light treatments on the leaf anatomical structure of walnut trees. Body caused by the impact. The results showed that Chl (a + b) content increased in leaves under 43% light illumination for a short time. When the light transmittance was lower than 69%, shade of walnut tree for a long time inhibited the synthesis of Chl (a + b) , 84% of the light conditions can promote the synthesis of Chl (a + b); the proline content of each shading treatment was significantly lower than the full light conditions; shading treatment can increase the leaf water potential, malondialdehyde, and both With the increase of shading degree, the stomatal length and stomatal area of leaves under 84% light treatment were significantly higher than those of control, but with the shading degree increasing, the length of epidermal cells, the thickness of upper and lower epidermis, the sponge, the thickness of palisade tissue , Sea / grid, stomatal density, stomatal area are reduced, stomatal length becomes larger. The results showed that shading with 43% light for a short time did not affect the walnut. When the light was lower than 69%, the shading for a long time would have an impact on the growth of walnut, and the 84% light had a certain promotion effect on the growth of walnut.