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施钾可提高土壤及苎麻地上部植株含钾量,适量钾可促进氮的吸收,提高苎麻抗旱性和抗花叶病能力,增加苎麻纤维产量和提高纤维品质;过量钾可致使钾的奢侈吸收,体内K/Ca、K/Na吸收比例严重失调,对苎麻生长发育产生不利影响。钾改善纤维支数的作用,与供氮水平密切相关,低氮条件下对纤维支数具有明显改良作用,而高氮条件下纤维品质(纤维支数)的决定性因素是供氮水平高低,钾对纤维品质的改良作用较小。推荐氮、钾肥施用适当配比(N/K_2O)为3:1～3:2,全年每亩钾肥施用量(K_2O计)为20～30kg。
Potassium application could increase the potassium content in aboveground parts of ramie and soil. Appropriate amount of potassium could promote the absorption of nitrogen, improve the ramie drought tolerance and anti-mosaic ability, increase the yield of ramie fiber and improve the fiber quality. Excessive potassium can cause the extravagant absorption of potassium , K / Ca, K / Na absorption in the body of a serious imbalance in the growth and development of ramie adversely affected. The role of potassium in improving the fiber count was closely related to the level of nitrogen supply, which significantly improved the fiber count under low nitrogen conditions. However, the determinants of fiber quality (fiber count) in high nitrogen were the levels of nitrogen supply, potassium Less effect on fiber quality improvement. The recommended ratio of N and K2O is 3: 1-3: 2, and the annual K2O application rate (K2O) is 20-30kg.