不同土壤水分含量对成熟期烤烟主要矿质元素和石油醚提取物的影响

目的]研究不同水分处理对成熟期烟叶K等主要矿质元素和石油醚提取物的影响。方法]通过盆栽试验,土壤水分分别为40%、60%、70%、80%,研究成熟期不同土壤水分对烟叶主要矿质元素和石油醚提取物的影响。结果]随着水分含量增加,K含量降低;K346中部叶中K含量受土壤水分影响最大,云烟97下部叶中K含量受土壤水分影响最大。土壤水分和品种对烟叶中P、Ca、Mg、Na、B、Zn、Cu、Fe含量的影响均达极显著水平;相关分析表明,土壤水分和烟叶中Fe、P、Ca、Mg含量呈负相关关系。土壤相对含水率为40%和80%时,其石油醚提取物含量相对较低;土壤相对含水率为60%和70%时,其石油醚提取物含量相对较高。结论]该研究为成熟期烟叶合理灌溉、提高烟叶内在品质提供理论依据。

Effects of Different Soil Moisture on Leaf Major Mineral Elements and Petroleum Ether Extract at Maturing Stage

Objective]To study effects of different soil water on leaf major mineral elements and petroleum ether extract.Method]A pot ex-periment was conducted to study effects of different soil water on leaf major mineral elements and petroleum ether.The soil moisture relative capacity was 40%,60%,70% and 80%.Result]The higher the soil moisture relative capacity,the lower the potassium of tobacco.Potassi-um of middle leaves of K346 and lower leaves of Yunyan 97 most affected by soil moisture.It was found that the influence of soil moisture on P,Ca,Mg,Na,B,Zn,Cu,Fe of tobacco reached a very significant level.The correlation analysis showed the negative correlation of the content of soil moisture and Fe,P,Ca,Mg.At the soil water level of 40%and 80% of field capacity,the content of petroleum ether was relatively smal-ler.At the soil water level of 60% and 70% of field capacity,the content of petroleum ether was relatively bigger.Conclusion]The study pro-vides a theoretical basis for the reasonable irrigation and improving the intrinsic quality of tobacco leaf.