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首页> 美国卫生研究院文献>The Scientific World Journal >Simulation of fertilizer requirement for irrigated wheat in Eastern India using the QUEFTS model
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Simulation of fertilizer requirement for irrigated wheat in Eastern India using the QUEFTS model

机译：使用QUEFTS模型模拟印度东部灌溉小麦的肥料需求

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Crop modeling can provide us with information about fertilizer dose to achieve the target yield, crop conditions, etc. Due to conventional and imbalanced fertilizer application, nutrient use efficiency in wheat is low. Estimation of fertilizer requirements based on quantitative approaches can assist in improving yields and nutrient use efficiency. Field experiments were conducted at 20 sites in eastern India (Nadia district of West Bengal) to assess the soil supply, requirement, and internal efficiency of N, P, K, and Zn in wheat. The data were used to calibrate the QUEFTS (Quantitative Evaluation of the Fertility of Tropical Soils) model for site-specific, balanced fertilizer recommendations. The parameters of maximum accumulation (a) and maximum dilution (d) in wheat were calculated for N (35, 100), P (129, 738), K (17, 56), and Zn (21502, 140244). Grain yield of wheat showed statistically significant correlation with N (R2 = 0.937**), P (R2 = 0.901**), and K uptake (R2 = 0.801**). The NPK ratio to produce 1 tonne grain yield of wheat was calculated to be 4.9:1.0:8.9. The relationships between chemical properties and nutrient-supplying capacity of soils were also established. The model was validated using the data from four other experiments. Observed yields with different amounts of N, P, K, and Zn were in good agreement with the predicted values, suggesting that the validated QUEFTS model can be used for site-specific nutrient management of wheat.
机译：作物模型可以为我们提供有关达到目标产量，作物状况等的肥料剂量的信息。由于常规肥料的使用不平衡，小麦的养分利用效率很低。根据定量方法估算肥料需求可以帮助提高产量和养分利用效率。在印度东部（西孟加拉邦的纳迪亚区）的20个地点进行了田间试验，以评估土壤供应，需求以及小麦中氮，磷，钾和锌的内部效率。这些数据用于校准QUEFTS（热带土壤肥力的定量评估）模型，以实现针对特定地点的平衡肥料建议。计算了小麦中氮（35，100），磷（129，738），钾（17，56）和锌（21502，140244）的最大积累量（a）和最大稀释度（d）的参数。小麦的籽粒产量与氮（R 2 = 0.937 **），磷（R 2 = 0.901 **）和钾素吸收（R 2 = 0.801 **）。计算出产生1吨小麦谷物的NPK比例为4.9：1.0：8.9。建立了土壤化学性质与养分供应量之间的关系。使用来自其他四个实验的数据验证了该模型。观察到的不同氮，磷，钾和锌含量的产量与预测值非常吻合，这表明验证的QUEFTS模型可用于小麦的特定部位养分管理。

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