摘要
为了解施肥对早酥红梨光合特性的影响,以6年生早酥红梨树为试验材料,进行N(0、400和800 g·株-1)、P2O5(0、300、600和900 g·株-1)、K2O(0、100和200 g·株-1)不同配比施肥,测定植株的叶绿素含量和蒸腾速率(Tr)、净光合速率(Pn)等光合指标,研究N、P和K配比施肥对早酥红梨光合特性的影响.结果表明:不同比例的N、P和K配比施肥均可提高叶片中叶绿素的含量,较不施肥增加7.18％～38.86％;较高的N(≥400 g·株-1)、K(200 g·株-1)施用量处理后,植株的净光合速率(Pn)等光合参数有了明显的提高,各指标的施肥效应表现为N＞K.当N、P和K配比用量分别为800、900和200 g·株-1时,可有效提高早酥红梨的光合效率,促进干物质量的积累,可在当地梨树栽植的施肥管理过程中参考应用.
Abstract
In order to understand the effects of fertilization on photosynthetic characteristics of Zaosuhong pear,the six-year-old Zaosuhong pear trees were used as experimental materials,and fertilization treatments with different ra-tios of N(0,400 and 800 g·plant-1),P2 O5(0,300,600 and 900 g·plant-1),and K2 O(0,100 and 200 g·plant-1)were applied.The chlorophyll content,transpiration rate(Tr),net photosynthetic rate(Pn)and other photosyn-thetic indexes of the plants were measured to study the effects of N,P and K ratio fertilization on the photosynthetic characteristics of Zaosuhong pear.The results showed as follows:different proportions of N,P and K ratio fertiliza-tion could increase the content of chlorophyll in leaves,which increased by 7.18％-38.86％compared with no fertili-zation;the photosynthetic parameters such as net photosynthetic rate(Pn)of plants were significantly improved af-ter the treatment of application amount of higher N(≥400 g·plant-1)and K(200 g·plant-1),and the fertiliza-tion effect of each index was N＞K.When the ratio of N,P and K was 800,900 and 200 g·plant-1,respectively,it could effectively improve the photosynthetic efficiency of Zaosuhong pear and promote the accumulation of dry mat-ter weight,which could be used as a reference in the fertilization management process of local pear tree planting.
基金项目
甘肃省林业和草原科技计划项目(2023kj012)
维普
万方数据