夏棉干物质积累和氮磷钾吸收分配规律的研究

• 作 者: 徐本生 杨建堂 籍玉尘 王文亮 霍晓婷
• 机 构: 河南农业大学农学系,河南农业大学农学系,河南农业大学农学系,河南农业大学农学系,河南农业大学农学系
• 出 处: 河南农业大学学报
• 发表日期: 1990年01期
• 关键词: 养分吸收量 磷钾 干物质 皮棉产量 夏棉 氧化钾 铃壳 中棉所 植株养分 蕾期

夏棉在亩产皮棉60～65kg产量水平下,每生产50kg 皮棉约需氮素6.6kg,P_2O_52.2kg,KO_27.3kg。干物质积累特点是,现蕾以前积累率为4%,现蕾至开花期急剧增加,占37%左右。开花至吐絮期仍有大量积累,约占60%。植株养分含量是生育前期高于后期.不同生育期养分吸收情况是,现蕾以前吸收量少,现蕾至开花期养分吸收增多,约有62%的氮素,61%的氧化钾和44%的磷酸是这一阶段吸收的。开花至吐絮仍大量吸收养分,约有1/3的氮素和氧化钾,50%的磷酸是开花以后吸收的。

In the summer cotton production of 60 ~ 65kg per mu lint level, about 50kg of lint required for production of cotton 6.6kg, P_2O_52.2kg, KO_27.3kg. The accumulation of dry matter is characterized by an accumulation rate of 4% before budding, a sharp increase from budding to flowering, accounting for about 37%. Flowering to the bolting period is still a lot of accumulation, accounting for about 60%. Plant nutrient content is higher than the early growth stage.Different growth stages of nutrient absorption is less absorption before budding, nutrient uptake from budding to flowering increased, about 62% of nitrogen, 61% of potassium and 44% The phosphoric acid is absorbed at this stage. Flowering to the boll is still a lot of nutrients, about 1/3 of nitrogen and potassium oxide, 50% of the phosphoric acid is after the absorption of flowering.