| 不同钾硼水平下棉花生长及钾硼利用效率的差异 |
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| 引用本文： | 吴秀文,姜存仓,郝艳淑,雷晶.不同钾硼水平下棉花生长及钾硼利用效率的差异[J].中国土壤与肥料,2016(2):95-98. |
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| 作者姓名： | 吴秀文 姜存仓 郝艳淑 雷晶 |
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| 作者单位： | 华中农业大学微量元素研究中心, 农业部长江中下游耕地保育重点实验室, 湖北 武汉 430070 |
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| 基金项目： | 国家自然科学基金(40801112)，公益性行业(农业)科研专项(201203013) |
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| 摘 要： | 用鄂抗8号棉花为试验材料,以水培的方法研究了不同钾、硼水平下棉花的生长状况及钾、硼的利用效率。结果表明:与正常处理(K 20 mg/L,B 0.2 mg/L)棉花相比,(1)缺钾(K 2 mg/L,B 0.2 mg/L)阻碍棉花地上部正常生长、干物质的积累,叶绿素合成受阻,但促进了根的伸长,缺钾不利于棉株对硼的吸收和利用,增加钾供应量可以促进硼的吸收利用。(2)缺硼(K 20 mg/L,B 0.002 mg/L)不利于棉株生长,棉株干物质积累量减少,不利于棉花对钾的吸收利用。(3)缺钾缺硼(K 2 mg/L,B 0.002 mg/L)时,棉花的生物量、SPAD值和钾、硼积累量均显著降低,钾的利用效率升高了143%,但对硼的利用受到抑制。研究结果表明,缺钾阻碍棉花对硼的吸收利用,缺硼不利于棉花对钾的吸收利用,而缺钾缺硼时,棉花对钾的利用受到促进,对硼的利用受到抑制。
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| 关 键 词： | 棉花 生长状况 硼 钾 利用效率 |
| 收稿时间： | 2014/12/31 0:00:00 |
| 修稿时间： | 2015/2/28 0:00:00 |
Effect of different levels of potassium/boron on cotton growth and potassium/boron use efficiency |
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| Abstract: | To study the effects of different levels of potassium ( K) and boron ( B) on cotton growth and B and K use effi-ciency, a pot experiment was conducted at Huazhong Agricultural University. The results showed that: compared with the normal treatment ( K 20 mg/L, B 0. 2 mg/L) , low K treatment ( K 2 mg/L, B 0. 2 mg/L) inhibited the growth of shoot and dry matter accumulation, chlorophyll synthesis and B absorption of cotton, but the growth of root was promoted; lack of B treatment ( K 20 mg/L, B 0. 002 mg/L) dry matter accumulation of cotton and K absorption were lower; and the normal growth and dry matter accumulation and SPAD of cotton were decreased significantly when both short of K and B ( K 2 mg/L, B 0. 002 mg/L) , the use efficiency of K was increased by 143%, and the use of B was restrained. The results showed that K deficiency decreased B absorption and utilization of cotton, and B deficiency inhibited K absorption and utili-zation of cotton, while both deficiency of K and B promoted the use of K and restrained the use of B. |
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| Keywords: | cotton growth boron potassium use efficiency |
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