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棉花是重要的经济作物,也是纺织工业的主导原料,在世界及我国国民经济中占重要地位。据中国棉花协会调查,在植棉面积不断缩减的形势下,2013年种植面积仍达455万公顷。在耕地减少的同时仍要保障粮食生产的前提下,植棉面积会持续减少,因此提高棉花的单产、品质至关重要,要提高棉花单产、品质,就应首先搞清棉花的生育特点,在此基础上,才能正确运用水肥措施,使棉花向高产、优质方向转变。1棉花生产的需肥规律1.1氮、磷、钾三要素对棉花生育的影响棉花在生长发育过程中,需要从土壤中吸收氮、磷、钾、硫、铁、钙、镁、锰等
Cotton is an important cash crop and also the leading raw material of the textile industry, occupying an important position in the world and in our national economy. According to the survey by the China Cotton Association, the planting area in 2013 still reached 4.55 million hectares under the situation of shrinking cotton area. Under the premise of reducing the cultivated land and still ensuring the grain production, the cotton planting area will continue to decrease. Therefore, it is of crucial importance to improve the yield and quality of cotton. To improve the yield and quality of cotton, we should first make clear the characteristics of cotton reproduction. Based on this, we can correctly use water and fertilizer measures to make cotton to high-yield, high-quality direction. Fertilizer requirements of cotton production 1.1 The impact of nitrogen, phosphorus and potassium on cotton growth Cotton needs to absorb nitrogen, phosphorus, potassium, sulfur, iron, calcium, magnesium, manganese, etc. from the soil during the growth and development