Reasoned fertilization of potato in response to Nitrogen supply in Andisols

Abstract

Using the reasoned nitrogen (N) fertilization method in potato crops (Solanum tuberosum L.) requires the validation of its parameters under the probable conditions of crop response. A field experiment in an Andisol was established to assess the parameters of this method and the nitrogen utilization efficiency of the crop. To describe the crop N response, five statistical models were used. Dry matter production and nutrient concentration were measured in tubers, leaves, fruits and roots. At both the beginning and the end of the experiment soil samples were collected to evaluate the mineral N. The quadratic-potential model was the most appropriate to describe the positive response of the potato crop to available nitrogen, from an initial level of nitrogen (the control, zero application ) to a maximum application of 200 kg N ha -1 . The relationship between the N doses and the potato yield reached a physical optimal of productivity at a rate of 228 kg N ha -1 . Higher rates (300 kg N ha -1 ) resulted in a decrease in yield, generating phytotoxicity for cultivation. This variation allowed us to evaluate the reasoned application method under different nitrogen availabilities (deficiency, optimal and above-optimal) in addition to the variation of the parameters generated.

Mulching-Induced Changes in Tuber Yield and Nitrogen Use Efficiency in Potato in China: A Meta-Analysis

“…Fertilization significantly influenced the effect of mulching on yield and NUE of potato. Without organic fertilization, mulching was most effective at improving yield and NUE at application of synthetic N and P 2 O 5 at rates of 100−200 kg ha −1 and K fertilization at 0−100 kg K 2 O ha −1 , demonstrating that the right combination of N, P, and K fertilization rate is an effective means to increase tuber yield and NUE, in agreement with previous studies [15,33,[38][39][40][41][42][43][44][45][46][47]. When organic fertilizer was applied, application of K fertilizer significantly reduced the benefit of mulching on yield and NUE, indicating that K and organic fertilizers should not be applied simultaneously when mulching is used.…”

“…Mulching greatly increased potato yield and NUE, which is in agreement with the results from other studies [15][16][17][18]. NUE of potato was less in China than in other countries in the world (160−240 kg tuber yield kg −1 N) [38][39][40][41][42][43][44][45][46][47]. This discrepancy may be associated with differences in the application Without organic fertilization, mulching significantly increased yield and NUE of potato by 25%−26% when P fertilizer was applied at 100−300 kg P 2 O 5 ha −1 and by 21% when P fertilizer was applied at <100 kg P 2 O 5 ha −1 .…”

“…Mulching greatly increased potato yield and NUE, which is in agreement with the results from other studies [15][16][17][18]. NUE of potato was less in China than in other countries in the world (160−240 kg tuber yield kg −1 N) [38][39][40][41][42][43][44][45][46][47]. This discrepancy may be associated with differences in the application rate of N, as some studies in other countries have been conducted at a low N rate (i.e., medium N rate, 100−200 kg N ha −1 ) [38][39][40][41][42][43][44][45][46][47].…”

“…NUE of potato was less in China than in other countries in the world (160−240 kg tuber yield kg −1 N) [38][39][40][41][42][43][44][45][46][47]. This discrepancy may be associated with differences in the application rate of N, as some studies in other countries have been conducted at a low N rate (i.e., medium N rate, 100−200 kg N ha −1 ) [38][39][40][41][42][43][44][45][46][47]. Mulching has been more effective at increasing potato yield and NUE in rainfed systems than in irrigated systems in Northwest China.…”

Effect of slow‐release nitrogen on the nitrogen availability in an andisol and the critical nitrogen concentration in wheat

“…In addition, the combined effect of fertilization strategies, including urea‐coated fertilizers, have provided positive results, both in reducing losses of N from agro‐ecosystems and in increasing crop yields (Grant et al., 2012; Thapa, Chatterjee, Johnson, & Awale, 2015). The combination of agronomic fertilization strategies, such as the split application of N fertilizer in function of the phenological stages of the crop (Zhou, Hooper, Coventry, & Denton, 2017) and the use of the reasoned fertilization (Pinochet, Clunes, Gauna, & Contreras, 2018) increases a crop's yields. Thus, synchronize the absorption with the availability, increases N use efficiency in agro‐ecosystem (Agyin‐Birikorang, Fugice, Singh, Sanabria, & Choudhuri, 2017).…”