| 氮、磷、钾肥对冬小麦根系营养效应的研究 |
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| 引用本文： | 谭金芳,吴建国,李开明. 氮、磷、钾肥对冬小麦根系营养效应的研究[J]. 河南农业大学学报, 1989, 0(1) |
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| 作者姓名： | 谭金芳 吴建国 李开明 |
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| 作者单位： | 河南农业大学农学系(谭金芳，吴建国)，郑州市二七区农经委(李开明) |
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| 摘 要： | 1986～1988年,在校内网室采用盆栽进行试验。初步探讨了氮磷钾对冬小麦根系营养效应;明确了冬小麦一生中,根内养分浓度因小麦不同生长时期以及施氮磷钾肥种类不同而异,根内氮和钾养分浓度变化为:播种～返青和抽穗～成熟这两段含量低;拔节～抽穗含量高。磷是前期明显地高于中期和后期。根对氮磷钾营养的吸收累积表现为播种～返青为平缓上升阶段;返青～抽穗为急剧上升阶段:抽穗～成熟为迅速下降阶段.根重的变化也表现为返青前根重较轻,返青～抽穗根重迅速增加至根重绝对量的最高点,后期根重又下降,全生育期根重变化呈抛物线型.显著性检验表明:氮磷处理对根重、养分浓度、养分吸收积累量及其强度影响最为明显.
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| 关 键 词： | 冬小麦 氮肥 磷肥 钾肥 吸收 |
Nutritional Characteristics of N,P,K Fertilizer on Winter Wheat's Root |
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| Tan Jinfang Wu Jianguo. Nutritional Characteristics of N,P,K Fertilizer on Winter Wheat's Root[J]. Journal of Henan Agricultural University, 1989, 0(1) |
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| Authors: | Tan Jinfang Wu Jianguo |
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| Abstract: | Pot experiments conducted from 1986 to 1988 indicate that the nutrientconcentration in wheat root varies with the growth period of wheat and the sortof N,P,K used in its whole life.The nutrient concentration of N,K inroot is lower from sowing to turning green and from heading to mature period,and higher from jointing to heading.As for P the concentration in early stageis considerably higher than that in intermediate stage and the stage after that.The amounts of absorption and accumulation of N,P,K into root show aslow increase from sowing to turning green period,a sharp increase from turn-ing green to heading,and a rapid decrease from heading to maturity. |
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| Keywords: | winter wheat nitrogenous fertilizer phosphatic fertilizer potassium fertilizer absorption |
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