不同微喷高度对葡萄光合特性和产量的影响

以无核白葡萄为试材,通过在不同高度(WP1:棚架上方50 cm,WP2:棚架下方50 cm,WP3:地上30 cm)进行每天1 h微喷调控,监测葡萄叶片光合特性和果粒生长发育,研究了不同微喷高度对葡萄生长发育的影响,以期为"无核白"葡萄的增产增效提供参考依据。结果表明:微喷处理的日平均SPAD值均高于对照处理,其中WP1处理的日平均SPAD值最高;净光合速率中WP1、WP2、WP3处理分别较对照处理提高6.6%、11.2%以及降低1.5%。各处理果粒体积及增长速率由大到小依次为WP2、WP3、CK、WP1,其中WP2与其它处理差异显著。在葡萄产量指标上,WP2处理产量最高,达51490.95 kg·hm^-2,较CK增产6.7%;WP1、WP3处理分别较CK降低24.2%和29.1%。由此得出,在棚架下方50 cm处每天微喷1 h能促进葡萄光合作用,对葡萄增产起到一定作用。

Effects of Different Micro-spray Height on Photosynthetic Characteristics and Yield of Grape

Taking ‘Thompson Seedless’ grape as the test material, the photosynthetic characteristics and fruit of grape leaves were monitored by micro-spraying at different heights(WP1,50 cm above the shelf;WP2,50 cm below the shelf;WP3,30 cm above ground).The growth and development of fruit grains, and the effects of different micro-spray heights on the growth and development of grape fruits were studied, in order to provide a reference for the increase and efficiency of ‘Thompon Seedless’ grape.The results showed that the daily average SPAD value of the micro-spraying treatment was higher than that of control, and the daily average SPAD value of WP1 was the highest;the net photosynthetic rate of WP1,WP2,and WP3 were increased by 6.6%,11.2%,and 1.5% lower than control, respectively.The fruit size and growth rate of each treatment were WP2,WP3,CK,WP1 in descending order, and WP2 was significantly different from other treatments.In terms of grape yield indicators, WP2 had the highest yield, reaching 51 490.95 kg·hm^-2,which was an increasing of 6.7% compared with CK;in the other treatments, WP1 and WP3 were 24.2% and 29.1% lower than CK,respectively.It could be concluded that micro-spraying at 50 cm below the shelf for 1 hour a day could promote photosynthesis of grapes and played a certain role in increasing grape production.