干旱区生态环境知识资源中心(Arid): 滴灌水分亏缺对猕猴桃生育前期光合特性的影响

Arid

	滴灌水分亏缺对猕猴桃生育前期光合特性的影响
其他题名	The Effect of Deficit Drip Irrigation on Photosynthetic Characteristics of Kiwifruit
	郑顺生; 崔宁博; 赵璐; 张艺璇; 龚道枝; 胡笑涛; 冯禹
来源期刊	灌溉排水学报
ISSN	1672-3317
出版年	2020
卷号	39 期号:11
中文摘要	【目的】探究滴灌水分亏缺对南方季节性干旱区猕猴桃生育前期光合特性的调控效应,为南方季节性干旱区猕猴桃节水高产种植提供理论依据。【方法】以9 a生金艳猕猴桃为研究试材,以充分灌溉为对照(CK),分别在抽梢展叶期(I)、开花坐果期(II)设置轻度、中度、偏重度及重度4种亏缺水平(记为LD 、MD2、MD1及SD,灌水量分别为CK的85%、75%、65%、55%),分析了滴灌水分亏缺对猕猴桃生育前期叶片光合特性的影响。【结果】水分亏缺显著降低猕猴桃生育前期叶片净光合速率(P_n)、蒸腾速率(T_r)和气孔导度(g_s),且降幅均随亏水度加重而增大,但P_n降幅小于T_r和g_s;与CK相比,I-MD1处理和II-MD2处理的P_n分别降低16.3%和6.5%,但叶片瞬时水分利用效率(WUEi)、叶片内在水分利用效率(WUEn)分别较CK提高7.7%、15.6%和8.1%、18.2% (P<0.05);水分亏缺后复水显著提高猕猴桃叶片P_n,其中I-LD处理复水后P_n较CK提高4.2%(P<0.05),达到5.94 mumol/(m~2·s),出现超补偿效应;T_r、g_s与水汽压差(Deltae)均呈二次曲线关系,Deltae小于2510~2 Pa时,T_r随Deltae增大显著增大,Deltae大于1710~2 Pa时,g_s随Deltae增大而明显降低。【结论】I-LD处理可在抽梢展叶期节水15%的情况下使猕猴桃叶片P_n提高4.2%,II-MD2处理可节约25%开花坐果期灌溉用水且使猕猴桃WUEi、WUEn分别提高8.1%、 18.2%,是南方季节性干旱区猕猴桃生育前期适宜的滴灌水分调控模式。
英文摘要	【Objective】This paper aims to unveil the effect of regulated deficit drip irrigation on photosynthetic characteristics of kiwifruit at its earlier growth stage by comparative experiments in attempts to provide a guidance for constructing water-saving and high-yield kiwifruit production in seasonally arid areas in southern China. 【Method】 The experiment compared five irrigation levels: sufficient irrigation (CK), and four other irrigations using 85% (LD), 75% (MD2), 65% (MD1) and 55% (SD) of the water used in the CK respectively. We took the variety of Jinyan as our model plant and the deficit irrigations were introduced at bud burst - leafing stage (I) or flowering - fruit set stage (II) respectively. Overall, we had eight treatments, excluding the CK. In all treatments and CK, we measured the photosynthetic indices.【Result】Deficit irrigations reduced net photosynthetic rate (P_n), transpiration rate (T_r), stomatal conductance (g_s) of the kiwifruit significantly. All these reductions increased with water deficit, despite T_r and g_s decreasing faster than P_n. Compared to CK, I-MD1 and II-MD2 reduced P_n by 16.3% and 6.5% respectively, while increased the instantaneous water use efficiency (WUEi) and intrinsic water use efficiency (WUEn) at leaf level by 7.7% and 15.6%, and 8.1% and 18.2% (P<0.05) respectively. Irrigation after a period of drying significantly increased P_n for the kiwifruit leaves and compared to CK, I-LD increased P_n by 4.2% to 5.94 mumol/(m~2·s) (P<0.05), indicating the rewetting could overcompensate the loss during the dry period. Both T_r and g_s varied with the vapor pressure difference (Deltae) quadratically, with T_r increasing significantly with Deltae when the vapor pressure difference (Deltae) was less than 2510~2 Pa. In contract, g_s was significantly reduced when Deltae was higher than 1710~2 Pa.【Conclusion】 The I-LD treatment increased P_n of the kiwifruit by 4.2% while in the meantime saving 15% of water in bud burst - leafing stage, compared to the CK. The II-MD2 saved 25% of water in the flowering - fruit set stage while in the meantime increasing WUEi and WUEn of the kiwifruit by 8.1% and 18.2% respectively. As such, II-MD2 is the optimal deficit drip irrigation at the earlier growth stage of the kiwifruit growing in the seasonally arid areas in southern China.
中文关键词	滴灌 ; 水分亏缺 ; 猕猴桃 ; 光合特性 ; 水分利用效率
英文关键词	drip irrigation water deficit kiwifruit photosynthetic characteristic water use efficiency
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6848555
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353590
作者单位	郑顺生, 四川大学, 水力学与山区河流开发保护国家重点实验室, 成都, 四川 610065, 中国. 赵璐, 四川大学, 水力学与山区河流开发保护国家重点实验室, 成都, 四川 610065, 中国. 张艺璇, 四川大学, 水力学与山区河流开发保护国家重点实验室, 成都, 四川 610065, 中国. 冯禹, 四川大学, 水力学与山区河流开发保护国家重点实验室, 成都, 四川 610065, 中国. 崔宁博, 四川大学;;西北农林科技大学, 水力学与山区河流开发保护国家重点实验室;;旱区农业水土工程教育部重点实验室, 成都;;杨凌, ;;陕西 610065;;712100. 龚道枝, 中国农业科学院农业环境与可持续发展研究所, 作物高效用水与抗灾减损国家工程实验室, 北京 100081, 中国. 胡笑涛, 西北农林科技大学, 旱区农业水土工程教育部重点实验室, 杨凌, 陕西 712100, 中国.
推荐引用方式 GB/T 7714	郑顺生,崔宁博,赵璐,等. 滴灌水分亏缺对猕猴桃生育前期光合特性的影响[J],2020,39(11).
APA	郑顺生.,崔宁博.,赵璐.,张艺璇.,龚道枝.,...&冯禹.(2020).滴灌水分亏缺对猕猴桃生育前期光合特性的影响.灌溉排水学报,39(11).
MLA	郑顺生,et al."滴灌水分亏缺对猕猴桃生育前期光合特性的影响".灌溉排水学报 39.11(2020).