有机无机复混钾肥钾素表观释放特征及对烤烟产质量的影响

为改善烟株移栽75 d后的钾素供应,提高中上部烟叶的含钾量,采用盆栽和大田相结合的方式,研究有机无机复混钾肥的钾素表观释放特征及不同施用方式对烟叶产质量、钾素含量及感观质量的影响。结果表明,4种不同有机质含量的有机无机复混钾肥均能改善钾素释放动态,提高烟株生育后期的钾素供应,其中以有机质含量18%,K₂O含量24%处理最为理想;对研制的30%有机无机复混钾肥及筛选的施肥方法在3个地区进行同田对比试验表明,处理组在烟叶含钾量、产量、产值及感观质量上均要显著好于对照组,3个地区烟叶含钾量增幅为11.43%~25.87%。30%有机无机复混钾肥能有效减缓钾素释放,显著提高烟叶含钾量,明显改善内在品质。

The K Apparent Release Characteristics of Organic-inorganic Compound Potash Fertilizers and Its Effect on Yield and Quality of Flue-cured Tobacco

In order to solve the supply of K at 75 days after transplanting and increase the content of K in tobacco leaves, pot and field experiments were carried out to study the effects of the organic inorganic mixed fertilizers on the K apparent release characteristics and the effects of different application methods on yield and quality of tobacco leaves, as well as the content of total K and sensory quality. The results showed that 4 kinds of organic inorganic mixed potassium fertilizers of different organic matter content could slow down the apparent release rate of K, with the treatment group of organic matter content 18%, K₂O content 24% had the best effect. Field experiments were carried out in 3 regions to verify the 30% organic inorganic mixed potassium fertilizer and screened method. The results showed that:the treatment group was significantly better than control in K content of tobacco leaf, yield, output value and sensory quality. K content of tobacco increased by 11.43%-25.87% in the three locations. The 30% organic inorganic mixed fertilizer could effectively slow down K release, significantly increase K content and improve inherent quality of tobacco Leaf.