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对山西省方山县峪口镇半干旱山区坡面的刺槐、白榆人工林木的光合速率和叶绿素含量受不同造林措施的影响而变化的规律进行了研究。结果表明,采取一定的集水措施——拍光坡面和在拍光的坡面上喷有机硅以防止雨水渗入而使较多的雨水流入植树穴内,可以有效地提高该地区林木的光合速率和叶片中叶绿素的含量。林木光合速率的变化趋势为:坡面喷有机硅>坡面砸实拍光>自然坡面。经有机硅集水的林木叶绿素含量均高于自然坡面。刺槐提高25%,白榆提高11%。降雨之后效果更为明显,尽管叶绿素含量均明显提高,如自然坡面,刺槐提高11.4%,白榆提高32.5%,但喷有机硅坡面的更为显著,刺槐提高19.2%,白榆提高45.2%。
The law of photosynthesis rate and chlorophyll content of Robinia pseudoacacia and Ulmus pumila tree in semi-arid mountainous area of Yanshan County, Shanxi Province under the influence of different afforestation measures was studied. The results showed that adopting certain water catchment measures - taking photoslope and spraying organic silicon on the slope of the light to prevent rainwater infiltration led to more rainwater flowing into the tree planting hole, which could effectively improve the photosynthetic rate And leaf chlorophyll content. The trend of photosynthetic rate of forest was as follows: Silicone sprayed on the slope surface> Real slope on the slope> Natural slope. The chlorophyll content of the organic-silica-based forest was higher than the natural slope. Black locust increased by 25%, white elm increased by 11%. After raining, the effect was more obvious. Although the content of chlorophyll increased obviously, such as the natural slope, the black locust increased by 11.4% and the white elm increased by 32.5%, but the organic silicon slopes were more obvious, the locust increased by 19.2% and the white elm increased by 45.2% %.