SUN Guili,LI Wandong,YusufuABULITIFU.Effects of Regulated Deficit Irrigation on Twig Water Potential of Korla Fragrant Pear[J].Northern Horticulture,2016,40(08):15-20.[doi:10.11937/bfyy.201608004]
调亏灌溉对库尔勒香梨幼枝水势的影响
- Title:
- Effects of Regulated Deficit Irrigation on Twig Water Potential of Korla Fragrant Pear
- 文献标志码:
- A
- 摘要:
- 以7年生库尔勒香梨为试材，设置不同根区灌溉方式，研究了果实不同发育时期土壤水分对香梨枝水势的影响。结果表明：调亏灌溉下，果实发育不同阶段库尔勒香梨枝水势的日变化均呈“V”字形，在14:00—16:00达到最低值；不同生育时期受干旱胁迫的香梨树枝水势明显低于正常灌溉的香梨枝水势；无论在干旱胁迫还是正常灌溉下香梨枝水势在开花期的日变化最为平缓，早晚枝水势基本一致，在坐果期和成熟期的枝水势日变化有一定的起伏，早晚水势差较小，而在果实膨大期的枝水势日变化起伏较大，早晚的水势差也较大。试验条件下不同生育期库尔勒香梨枝水势与土壤含水量呈正相关关系，通过回归分析建立了不同生育期二者的函数关系，并确定了不同生育期阶段适宜香梨树生长的枝水势和土壤含水量的低限值范围。
- Abstract:
- 7-year-old Korla pear was used as test materials，different root irrigation method was set，Korla pear water potential and soil moisture at different growth stage were studied.The results showed that the diurnal variation fragrant pear twig water potential of Korla pear showed a ‘V’ type in different growth stages under different irrigation methods，reached the lowest value at noon of one day.The water potential of Korla pear under drought stress was significantly lower than twig water potential of normal irrigation.There were obvious consistency between sticks water potential change and average soil volumetric water content change in different growth period of Korla pear.Twig water potential of Korla pear was generally low，and the water potential difference was large in morning and evening in fruit enlargement stage.Diurnal variation of Korla pear twig water potential was the most gentle in flowering stage，and the twig water potential had no more difference in morning and evening.There was a certain fluctuations about diurnal variation of fragrant pear twig water potential in fruit setting and maturity stage，and the twig water potential had a little difference in morning and evening.Diurnal variation of pear twig water potential fluctuated considerably in fruit enlargement stage under two irrigation methods.The regression analysis was established both fragrant pear twig water potential and soil water content at different growth stages.Without affecting the normal growth conditions，the limits of fragrant pear branch water potential and soil moisture in different growth stages of Korla pear was determined.
参考文献/References:
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备注/Memo
第一作者简介：孙桂丽（1979-），女，博士，副教授，现主要从事林木生理生态等研究工作。E-mail:sxfgl@126.com.基金项目：新疆农业大学校前期课题资助项目（XJAV201213）；新疆农业大学自治区果树学重点学科开放课题资助项目。