栽培措施对马铃薯主粮化品种陇薯9号光合参数及产量的影响

Effects of Cultivation Measures on Photosynthetic Parameters and Yield of Potato Staple Food Cultivar Longshu 9

以马铃薯主粮化品种陇薯9号为材料,研究了覆膜、大垄、减N等栽培措施对植株叶片光合生理参数、田间枯萎病及产量的影响。结果表明,覆膜和施肥处理显著影响陇薯9号叶片光合生理参数和叶片中相对叶绿素含量(SPAD值),其中减施N肥10%对陇薯9号叶片光合生理参数影响更加明显。在相同的施肥条件下,覆膜栽培陇薯9号原种田间枯萎病发病率显著高于露地栽培;120 cm覆膜大垄双行栽培陇薯9号原种田间枯萎病发病率明显低于90 cm覆膜单行,田间块茎产量最高。说明高寒阴湿旱作区适量减施N肥则更符合马铃薯经济、高效、安全生产要求。

With potato staple food cultivar Longshu 9 as the experimental material,the effects of cultivation measures of film mulching,big ridge,and reduction of nitrogen on the photosynthetic physiological parameters,the wilt incidence and tuber yield were studied. The results show that the treatments of film mulching and fertilization significantly affected photosynthetic physiological parameters and leaf SPAD values of Longshu 9,while the treatment of Nitrogen reduction by ten percent had an obvious effect on photosynthetic parameters. Under the same fertilization conditions,the wilt incidence in the film mulching treatment was significantly higher than that in open field condition. While the field wilt incidence of Longshu 9 under film mulching model with ridge width of 120 cm was significantly lower than that of the control with ridge width of 90 cm,and the tuber yield was the highest. It indicates that the suitable reduction of nitrogen fertilizer in Chilling and Humid Region of High-elevation area better accord with the requirement of economic,efficient and safe production of potato.