冬作薯片专用型马铃薯大西洋密度及肥料配比试验

Effects of Different Density and Fertilizer Combination on Yield of Atlantic, a New Quality Potato Variety with Special-purpose

对薯片专用型马铃薯大西洋在贵州低热河谷地区冬作的密度和肥料配比试验结果表明:种植密度和肥料配比对大西洋的产量均有显著影响,密度6000株/667m2,施肥配比N∶P2O5∶K2O=1∶0.5∶1处理产量最高,密度4000株/667m2,施肥配比N∶P2O5∶K2O=1∶0.5∶1处理最低;种植密度与单株产量和商品率呈负相关,但不影响商品薯产量和经济效益;在高密度和较低施肥处理下获得了较好的经济效益,在相同密度下,肥料投入与纯收入呈负相关。

The experiment was conducted to investigate effects of different density and fertilizer combination on yield of Atlantic potato variety in the low-hot river valley area in Guizhou. The results indicate that the planting density and fertilizer combination affect the potato yield of Atlantic significantly. There is a negative correlation between planting density and yield per plant, potato commercial rate but it does not affect the commercial potato yield and economic benefit. The better economic benefit can be obtained under the higher density and lower application amount. There is a negative correlation between application amount and pure income under the same density.