Estimating Nutrient Uptake Requirements for Potatoes Based on QUEFTS Analysis in China

Xu, Yongjian; He, Ping; Xu, Xinpeng; Qiu, Shaojun; Ullah, Sami; Gao, Qiang; Zhou, Wei

doi:10.2134/agronj2018.09.0572

Cited by 20 publications

(30 citation statements)

References 34 publications

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“…As shown in Figure 2, only one HI observation was below 0.4. For all watermelon data, HI in this study ranged from 0.33 to 0.95 with an average of 0.72 (Figure 2), which was similar to the HI values in potato plantations [33].…”

Section: Selection Of Data For Adapting the Quefts Modelsupporting

confidence: 78%

“…The balanced nutrient removals from fruits were 1.1 kg N, 0.2 kg P, and 1.8 kg K to product 1000 kg of fruit, indicating that about 50.9% N, 58.2% P, and 66.4% K were removed from the shoots of watermelons (Table 7). The nutrient HI calculated by the QUEFTS model (Table 7) were lower than the average observed values of nutrient HI (Table 4), indicating that the presence of luxury nutrient consumption throughout the watermelon growth cycle in situations of excessive fertilization and adequate indigenous nutrient supply [33]. These results confirmed the importance of assessing nutrient uptake requirement for rational fertilizer applications.…”

Section: Estimating the Balanced Nutrient Uptakesmentioning

confidence: 60%

“…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].…”

Section: Internal Efficiency and Reciprocal Internal Efficiencymentioning

confidence: 99%

“…The root mean square error (RMSE), normalized-RMSE (n-RMSE), and mean error (ME) were used to evaluate the QUEFTS model and the deviation between the measured and simulated data [33]. RMSE, n-RMSE and ME were calculated using the following formula:…”

Section: Field Validationmentioning

confidence: 99%

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Estimation of Watermelon Nutrient Requirements Based on the QUEFTS Model

et al. 2020

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Estimating balanced nutrient requirements for a watermelon plantation is essential to increase its fruit yield and nutrient use efficiency. This is vital for China, which produces 60% of world’s watermelons with excessive fertilizer application. Therefore, datasets between 2000 and 2019 from field experiments in major watermelon producing regions across China were collected to assess relationships between fruit yield and nutrient uptake, and to estimate nitrogen (N), phosphorus (P), and potassium (K) requirements for a target yield using a modified Quantitative Evaluation of the Fertility of Tropical Soils (QUEFTS) model. The results showed that the QUEFTS model predicted a linear increase in fruit yield to 60–70% of the total potential yield when balanced amounts of N, P, and K nutrients were absorbed. To produce 1000 kg of watermelon, 2.11 kg N, 0.27 kg P, and 2.69 kg K were required in shoot, and the corresponding internal efficiencies (IE) were 475, 3682, and 372 kg fruit per kg of N, P, and K, respectively. The modified QUEFTS model also simulated a balanced N, P, and K removal by fruit (accounting for 50.9%, 58.2%, and 66.4% of these nutrient accumulations in shoots, respectively). Field validation experiments further verified that the modified QUEFTS model could be used for estimating balanced nutrient requirements. Results from this study can provide practical guidance on fertilizer recommendations for improving fruit yield while preventing excessive or deficient nutrient supplies in China’s watermelon plantations.

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Section: Selection Of Data For Adapting the Quefts Modelsupporting

confidence: 78%

Section: Estimating the Balanced Nutrient Uptakesmentioning

confidence: 60%

Section: Internal Efficiency and Reciprocal Internal Efficiencymentioning

confidence: 99%

Section: Field Validationmentioning

confidence: 99%

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Estimation of Watermelon Nutrient Requirements Based on the QUEFTS Model

et al. 2020

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“…However, it should be noted that the NHI may be different for different potato cultivars, and different values for NHI have been observed. High values of 88% (Vos, 1997) and 85% (Biemond and Vos, 1992) have shown to be feasible, but current NHI in China ranges between 43 and 91%, with an average of 64% (Xu et al, 2019), similar to what we found in our dataset.…”

Section: Different Situations Based On the Long-term Soil Nitrogen Basupporting

confidence: 85%

Synergies and trade-offs between yield, quality, resource use efficiency and environmental impact of potato production in China

Wang

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Potato is the fourth most important food crop in China. However, the yield is relatively low and the production is associated with high resource inputs and serious environmental problems. Potato production should be enhanced with sustainable practices that strike the right balance between multiple sustainable development objectives (agronomic, economic and environmental). The major aim of the present study was to explore the theoretical possibilities and demonstrate pathways for sustainable intensification of potato cultivation in China that optimize yield and quality, use natural resources efficiently, and minimize environmental impacts simultaneously. Crop modelling and farm surveys were used to assess these objectives at national and regional level, while on-farm experiments were performed to evaluate sustainable practices at local level. The biophysical potential of the potato crop in China was explored and the scope for enhancing yield was estimated. There is large potential to improve potato yield across the country under both irrigated and rainfed conditions (the yield gap is 66% and 61%, respectively, for irrigated and rainfed potato crops). A great improvement in yield can be achieved under rainfed conditions with current precipitation levels, especially in Qinghai and Heilongjiang in the north, and Guizhou in the southwest. Enhancing yield from actual to the potential yield level (under irrigated conditions) is associated with improved water productivity (from 7.9-22.3 to 30.7-54 kg dry matter ha-1 mm-1). Compared to the major cereals, potatoes have a larger potential to contribute to future food self-sufficiency in China as implied by the remarkable energy production gap (i.e., the additional calories provided by potatoes by closing the yield gaps to 80% of the potential yield under irrigated conditions and water-limited potential yield under rainfed conditions are 1.1 10 14 and 0.9 10 14 kcal calories, respectively). Improving environmental sustainability of potato cultivation should also be economically viable, and both yield and quality are key components driving the revenues for farmers. A framework was developed to assess the interrelationships between yield, quality and the influences on revenue. The framework was applied in a case study of commercial French Fries potato production in Inner Mongolia in the north. Farmers obtained low revenue (the gap between the revenue from the best performing farmers and actual revenue was 43%) as a consequence of moderate yield gap (the gap between the maximum farmers' yield and actual yield was 26%) and poor tuber quality (i.e., low dry matter percentage of tubers, and high percentage of weight of the small-sized tubers). It was found that enhancing yield up to the maximum yield obtained by farmers in the case study (55 ton fresh matter ha-1) was strongly associated to improvement in quality and revenue, suggesting synergies for reaching different objectives. An integrated assessment on yield, resource use efficiencies (nitrogen use efficiency and water produ...

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Scope and strategies for sustainable intensification of potato production in Northern China

2020

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Potato (Solanum tuberosum) is an important staple crop in China, however, potato yields are low, and thus a general aim is to produce more crop with fewer resources and minimal environmental effects. This study aimed to assess the relationships between yield, resource use efficiencies, and environmental performance of potato production in China. Three major potato production regions (Inner Mongolia, Gansu, and Heilongjiang) were surveyed. The current production performance was evaluated, and the scope for improvement was assessed based on a lower and upper target for yield (financial breakeven point and 85% of the potential yield, respectively), water productivity (upper target is 85% of the potential water productivity), nitrogen use efficiency (50 and 90%) and nitrogen surplus (upper target is 80 kg ha −1). Long-term situations were evaluated to identify the target values of nitrogen use efficiency and nitrogen surplus based on currently available technologies. The results indicate that in the short-term nitrogen fertilizer input can be reduced by allowing for soil nitrogen mining to improve the nitrogen use efficiency and reduce nitrogen surplus. Water productivity can be increased by enhancing yield, and water surplus can be reduced by more efficient management of irrigation and rainfall water. In the long-term, with good agronomy, we assess it is feasible to improve yield (from 33-43 to 46-57 t FM ha −1), improve nitrogen use efficiency (to 84%), and reduce nitrogen surplus (from 50-156 to 16-34 kg N ha −1) simultaneously. The latter should be validated experimentally.

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Estimating Nutrient Uptake Requirements for Potatoes Based on QUEFTS Analysis in China

Cited by 20 publications

References 34 publications

Estimation of Watermelon Nutrient Requirements Based on the QUEFTS Model

Estimation of Watermelon Nutrient Requirements Based on the QUEFTS Model

Synergies and trade-offs between yield, quality, resource use efficiency and environmental impact of potato production in China

Scope and strategies for sustainable intensification of potato production in Northern China

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