Phosphorus Fertilizer Rate for Fresh Market Potato Cultivars Grown in Tropical Soil with Low Phosphorus Availability

被引：21

作者：

Fernandes, Adalton M. ^{[1
]}

Soratto, Rogerio P. ^{[2
]}

机构：

[1] Sao Paulo State Univ UNESP, Ctr Trop Roots & Starches CERAT, POB 237, BR-18610307 Botucatu, SP, Brazil

[2] Sao Paulo State Univ UNESP, Dept Crop Sci, Coll Agr Sci, POB 237, BR-18610307 Botucatu, SP, Brazil

来源：

AMERICAN JOURNAL OF POTATO RESEARCH | 2016年 / 93卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

Solanum tuberosum; Applied P-use efficiency; Foliar diagnosis; Tuber number; Tuber size; Tuber yield; USE EFFICIENCY; RUSSET BURBANK; TUBER YIELD; NITROGEN;

D O I：

10.1007/s12230-016-9515-7

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Knowledge on phosphorus (P) response of main potato cultivars is essential to rational fertilization management and maximize yield, mainly in tropical soils that usually have low P availability. An experiment was conducted to evaluate the effect of P fertilization rates (0, 125, 250, 500, and 1000 kg P2O5 ha(-1)) on leaf nutrient concentrations, tuber yield and size distribution, as well as applied P-use efficiency (APUE) in the potato cultivars Agata and Mondial. The results indicated that it is not necessary to evaluate the P-nutritional status and adjust P recommendations on a cultivar basis because P fertilization resulted in similar increases in the leaf P concentration of both cultivars, and the cultivars responded to the same P rate (500 kg P2O5 ha(-1)). However, Mondial had a higher APUE and was more responsive than Agata to the same P rate. A leaf P concentration of 2.9 g kg(-1) was superior to 2.5 g kg(-1) as the lower limit of the P sufficiency range for Agata and Mondial.

引用

页码：404 / 414

页数：11

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