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大豆的需肥特性是什么?答:大豆是需肥较多的作物。每生产100公斤大豆籽实及其相应的茎、叶、荚壳等,需要吸收氮5.3～7.2公斤、五氧化二磷1.0～1.8公斤、氧化钾1.3～4.0公斤。大豆吸收的氮、磷、钾比稻、麦要多得多。大豆籽实含氮量是小麦的2倍多,是水稻的4倍多;含磷量比小麦多30%,比水稻多40%;含钾量是小麦的2倍多,是水稻的4倍多。大豆不同生育时期的吸肥情况是不同的:从出苗到始花期,三要素吸收量占总量的25%～33%;从始
What are the characteristics of soybean needs? A: Soybean is more fertilizer to be crop. Each production of 100 kg of soybean seeds and their corresponding stems, leaves, pods, etc., need to absorb 5.3 to 7.2 kg of nitrogen, phosphorus pentafluorophosphate 1.0 to 1.8 kg, 1.3 to 4.0 kg of potassium oxide. Soybean absorbed nitrogen, phosphorus, potassium than rice, wheat and much more. Soybean seeds contain more than twice as much nitrogen as wheat and more than four times as much as rice. Phosphorus content is 30% more than that of wheat, 40% more than that of rice; potassium content is more than twice that of wheat and more than four times of that of rice . Soybean absorption during different growth stages are different: from emergence to the beginning of flowering, the three elements of the total amount of absorption accounted for 25% to 33%; from the beginning