Impact of phosphorus rate, soil fumigation, and cultivar on potato yield, quality, phosphorus use efficiency and economic returns in a high phosphorus soil

被引:4
作者
Huo, Weige [1 ]
Crants, James E. [1 ]
Miao, Yuxin [1 ]
Rosen, Carl J. [1 ]
机构
[1] Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA
关键词
Potato cultivar; Solanum tuberosum; P rate; Fumigation; Yield; P use efficiency; Economic returns; ARBUSCULAR MYCORRHIZAL FUNGI; MANAGEMENT; FERTILIZATION; INOCULATION; INCREASES; GENOTYPE; CROPS; WATER;
D O I
10.1016/j.eja.2023.127069
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Phosphorus (P) is a non-renewable resource that will become an economic limiting factor for food production in the future. Potato (Solanum tuberosum L.) is a relatively shallow rooted crop and often responds positively to P fertilizer even in soils with high soil -test P. Therefore, high -rate P fertilizers are commonly applied to produce high tuber yields in commercial potato fields. The purpose of this study was to evaluate the effects of P rate, cultivar, and soil fumigation on potato yield, quality, P uptake, P use efficiency and economic returns under high soil test P conditions. A field study with a split -plot randomized complete block design was conducted in 2021 and 2022, with fumigation treatments (no fumigant or fall -applied metam sodium) being the main plots and cultivars (Ivory Russet or Russet Burbank) as subplots. Each subplot was further divided into five sub -subplots with different P rates: 0, 37, 73, 147 and 220 kg P ha -1. The results indicated that Russet Burbank produced higher total yield than Ivory Russet. Fumigation significantly increased tuber yield and dry matter percentage. Both cultivars responded to P application and tuber P uptake increased with P rate even under very high soil test P conditions. Both partial factor productivity (PFP) and P recovery efficiency (PRE) were very low and significantly decreased with the P rate. Russet Burbank had higher PFP and PRE than Ivory Russet, and fumigated plots had significantly higher PRE than non -fumigated plots. The tuber yield output and net revenue of Russet Burbank was higher than Ivory Russet, and the highest economic return was obtained in fumigated plots at 147 kg P ha -1. These results suggest that cultivar selection and control of soil -borne diseases should be considered to optimize P input, tuber yield, and to conserve P resources.
引用
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页数:11
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