Quantitative Estimation of the Nutrient Uptake Requirements of Peanut

Abstract

Understanding the characteristics of the balanced nutrient requirements for peanut to achieve target yields is paramount when formulating fertilizer management strategies to increase yields and avoid fertilizer loss. Nutritional requirement estimation models can provide effective alternatives for the estimation of the optimum crop balanced nutrient requirements under varied agricultural conditions which are less time consuming and expensive. In the present study, the quantitative estimation of the optimum crop balanced nutrient requirements of peanut in China were obtained using quantitative evaluation of fertility of tropical soils (QUEFTS) model. The database covered the main agro-ecological region for peanut crops in China between 1993 and 2018. The predicted results of the QUEFTS model indicated that nutrient uptake requirements increased linearly with increasing pod yields until the yields had reached approximately 60% to 70% of the potential pod yields. It was found that with the increasing pod yields during the nutrient linear absorption stage, the plants had required 38.4 kg N, 4.3 kg P, and 14.0 kg K in total to produce 1000 kg of pods, and the corresponding internal efficiencies were 26.0 kg N/kg, 235.0 kg P/kg, and 71.6 kg K/kg, respectively. In addition, the balance rates of the removal nutrient in the pods were determined to be 29.4 kg N, 2.9 kg P, and 4.9 kg K per 1000 kg of pod yield, or approximately 76.5%, 67.4%, and 34.7% of N, P, and K in the total plants, respectively. This study’s field validation experiments verified the applicability and accuracy of the QUEFTS model. Therefore, it was considered to be an effective alternative for the estimation of the optimal balance N, P, and K uptake requirements for peanut crops. These findings will potentially be helpful when making future decisions regarding fertilizer recommendations for peanut crops in China.

Nutrient uptake behavior of peanut under optimum fertilization management in China

“…The average pod K concentration was similar to that reported (7.1 g kg −1 ) by Xie et al (2020), whereas the straw K concentration was greater than 12.9 g kg −1 of their reports. The requirement of N (47.7 kg), P (7.1 kg), and K (20.7 kg) per Mg pod yield in this study were greater relative to that reported (38.4 kg N, 4.3 kg P, and 14.0 kg K) by Xie et al (2020). Most of the data in this study is derived from optimum fertilization treatments, with an average pod yield of 4.48 Mg ha −1 .…”

“…Peanut total P uptake also increased with increasing pod yield, with roughly 50% of the variation in P uptake explained by pod yield (Figure 3A). Across all data, peanut P requirement per Mg pod yield averaged 7.1 kg, which was greater than the 4.3 kg reported by Xie et al (2020) but lower than the 7.9 kg documented by Wu et al (2019). Differences in P requirements per Mg pod yield might be due to pooling of dataset from different locations and experiments.…”

Soil Fertility Management for Better Crop Production

“…Using the QUEFTS model (Quantitative Evaluation of the Fertility of Tropical Soils), Xie et al [16] demonstrated a linear accumulation of nutrients with increasing yield. Nutrient accumulation decreased slightly after yields reached~60% to 70% of the potential yield.…”

Estimation of Watermelon Nutrient Requirements Based on the QUEFTS Model

“…These results indicated that nutrition management practices had a great influence on IE values. Additionally, due to the diversities of plant growth characteristics and other factors, the IEs of N, P, and K were greater than other crops such as maize [30], soybean [14], peanut [53], and potato [33].…”