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研究表明,在皖北地区,采用一次性单行条施全部氮肥易导致在旺长前地上部分生长过旺、下部叶前后半片厚度差异明显,肥料淋溶损失大、肥效降低,烟田明显无后劲。同时在干旱气候条件下移栽根系受肥料灼伤的风险。采用单株定量侧穴施肥、基施和追施相结合,因肥料局部集中且烤烟生长前期降水不足导致烟株早期生长缓慢,肥效明显向延迟。采用基施(NH4-N)和追施(NO_3-N)相结合基肥为单株定量环穴施肥,与剪叶育苗技术、“旱地培土”技术相配套,则很好地克服了前两者的缺点,且提高了烟叶品质和肥料的利用率。因而是皖北烟区目前最适宜的施肥方法。
The results showed that all the nitrogen fertilizers in the northern part of Anhui Province could lead to over-growth in the aerial parts of the Mongolian wilderness. The differences in the thickness of the lower part of the lower part of the leaf were significant, the loss of fertilizers was large and the fertilizer efficiency was reduced. . At the same time, the root system transplanting under the arid climate is affected by the risk of fertilizer burns. The combination of basal and topdressing with quantitative yield of single plant, combined with top dressing and top dressing, resulted in slow growth of tobacco plants in early stage due to local concentration of fertilizers and insufficient precipitation in early growth stage of flue-cured tobacco, and the fertilizer effect was obviously delayed. The combination of basal (NH4-N) and topdressing (NO3-N) combined with basal fertilizer was applied to quantitatively circularly fertilize the foliage, which was in good agreement with the techniques of cutting leaf and nursery and " Shortcomings, and improve the quality of tobacco and fertilizer utilization. Therefore, it is the most suitable fertilization method in northern Anhui.