愈合期不同光照强度对黄瓜嫁接苗的影响

储玉凡 翟挺楷 林碧英 杨玉莹 钟路明

摘 要：研究愈合期不同光照强度对黄瓜嫁接苗定植前质量的影响，旨在为黄瓜嫁接愈合光照的精确化调控提供參考依据。试验将嫁接愈合分为1～3 d、4～6 d、7～10 d 3个时段，分别给予6种不同光照强度梯度处理。结果表明，愈合期在45-90-135 μmol·m-2·s-1的光照强度梯度下嫁接苗地上部与地下部形态生长显著提升，形态综合指标最佳，较传统愈合条件（0-30-45 μmol·m-2·s-1）下可溶性糖与可溶性蛋白含量分别提升了65.87%、15.85%，叶绿素荧光参数也表现最优。综合分析表明，45-90-135 μmol·m-2·s-1的光照强度梯度最有利于黄瓜嫁接苗生长，最有利于嫁接苗可溶性糖和可溶性蛋白的积累，且叶片的光合电子传递效率、光合效率和自我保护调节机制较好，可作为黄瓜嫁接愈合期的光照强度条件，这为提升黄瓜嫁接苗的商品质量提供了一些理论依据。

关键词：黄瓜;光照强度;嫁接;愈合;商品质量

中图分类号：S642.2+S624.4+2 文献标志码：A 文章编号：1673-2871（2021）01-049-06

Effects of different light intensity on cucumber grafted seedling in the healing stage

CHU Yufan， ZHAI Tingkai， LIN Biying， YANG Yuying， ZHONG Luming

（ College of Horticulture， Fujian Agriculture and Forestry University， Fuzhou 350002， Fujian， China）

Abstract：In order to provide a reference basis for the precise regulation of cucumber grafting healing light， the effect of different light intensity on the quality of cucumber grafting seedlings before transplanting during the healing period was studied. Graft healing period was divided into 1-3 d， 4-6 d， 7-10 d three  stages in this research， 6 different light intensities were set. The results showed that the morphological growth of aboveground and underground parts of the grafting seedling was significantly improved under the treatment of 45-90-135 μmol·m-2·s-1 light intensity ， the best comprehensive index was found of which， the soluble sugar and soluble protein contents were increased by 65.87% and 15.85% respectively compared to traditional healing conditions（0-30-45 μmol·m-2·s-1）， and the chlorophyll fluorescence parameters of which was batter than other treatments. In summary， 45-90-135 μmol·m-2·s-1 light intensity  was the most suitable light for the growth of cucumber grafting seedling， which was most conducive to the accumulation of soluble sugar and soluble protein in grafted seedlings， and the photosynthetic electron transfer efficiency， photosynthetic efficiency and self-protection regulation mechanism of leaves were better， which could be used as a condition of light intensity in the healing period of grafted cucumber， and provide some theoretical basis for improving the quality of cucumber grafting seedlings.

Key words： Cucumber; Light intensity; Grafting; Healing; Commodity quality

嫁接是目前抵御植物生长逆境、提升作物产量最简单有效的技术措施。嫁接提升了作物的抗逆性[1-3]，也有利于克服连作障碍[4]，同时增强了其对养分的吸收能力，从而提升了作物的产量和品质[5]。随着嫁接技术的普及和市场发展的需要，嫁接苗逐渐商品化[6];嫁接技术和嫁接后环境条件对缩短愈合期、提高嫁接苗质量、降低苗木成本影响重大。

在逆境条件下，嫁接苗的接穗与砧木能够互利互惠[7]，共同提高植株的产量;而各种环境因子对于嫁接苗的质量都有重要影响，实现环境因子的精准化控制是农业现代化发展的必然要求。……