摘要
为研究极端干旱区微喷灌水技术对葡萄生理和产量的影响,通过对葡萄不同生育期叶片SPAD值、叶绿素含量和产量的测定,分析不同微喷周期条件下各处理的叶片SPAD值、叶绿素含量的变化特征和相互关系及对产量的影响。结果显示:在不同喷水周期条件下,各处理的SPAD值呈先减小后增大的变化趋势,日变化值为38.31~43.8。其中,每天喷水1h处理的SPAD值日平均值最高,为42.0,之后是对照处理和每隔1d喷水2h处理,分别为41.2和40.3,每隔2d喷水3h处理的SPAD值最低,为39.3。葡萄SPAD值与叶绿素a、叶绿素b以及总叶绿素含量间相关关系显著,回归方程分别为Ca=0.1028VSPAD-2.2266、Cb=0.0796VSPAD-2.3749、Ct=0.1824VSPAD-4.4602。在葡萄品质指标和产量上,采用微喷可以提高VC含量、多酚含量和单宁含量等多项品质指标,并使葡萄平均增产5.4%,表明合理的微喷周期处理有利于提高葡萄叶片叶绿素含量,并使产量增加,而叶绿素仅是葡萄生理生长的指标之一,如光合、叶绿素荧光等指标对葡萄生理的影响仍需作更深入的研究,以期能更进一步揭示微喷条件下的葡萄增产作用机理。
In order to study the effect of Micro-sprinkler Irrigation on grape physiology and yield in extreme arid area,the SPAD value,chlorophyll content and yield of grape leaves at different growth stages were measured,and the variation characteristics and correlation of SPAD value and chlorophyll content of grape leaves under different micro-sprinkler periods were analyzed.The results showed that the SPAD values of all treatments decreased at first and then increased at different spraying cycles.The daily variation ranged from 38.31 to 43.8.The daily average SPAD values of spraying water for 1 hour per day were the highest,which was 42.0.Then the control treatment and spraying water for 2 hours every other day were 41.2 and 40.3,respectively.The lowest SPAD value was 39.3 after 2 days of spraying for 3 hours.The correlation between SPAD value and chlorophyll a,chlorophyll b and total chlorophyll content was significant.The regression equations were Ca=0.102 8 VSPAD-2.226 6,C b=0.079 6 V SPAD-2.374 9 and C t=0.182 4 VSPAD-4.460 2,respectively.In terms of grape quality and yield,micro-spraying could increase VC content,polyphenol content and tannin content,and increase grape yield by 5.4%on average.The results showed that reasonable micro-spraying period could improve the chlorophyll content of grape leaves and increase grape yield,but chlorophyll was only one index of the grape physiological growth indexes.So the effects of photosynthesis,chlorophyll fluorescence and other indicators on grape physiology need to be further studied in order to further reveal the mechanism of grape yield increase under micro-spraying irrigation conditions.
作者
刘洪波
白云岗
张江辉
丁平
LIU Hong-bo;BAI Yun-gang;ZHANG Jiang-hui;DING Ping(Xinjiang Research Institute of Water Resources and Hydropower,Urumqi 830049,China)
出处
《节水灌溉》
北大核心
2019年第5期31-34,40,共5页
Water Saving Irrigation
基金
国家自然科学基金地区基金项目(51569034)
自治区公益性科研院所基本科研业务经费资助项目(KY2018117)
关键词
微喷
葡萄
SPAD值
叶绿素含量
micro spray irrigation
grape
SPAD value
chlorophyll content
