雪茄烟田间生长期干物质及氮、磷、钾累积规律分析

Analysis of dry matter and accumulation of N,P,and K of cigar during field growth period

通过大田高密度取样对来凤县主栽雪茄烟品种监测干物质累积与氮、磷、钾分配研究,为后续合理施肥和产质量调控提供数据支持。结果表明,雪茄烟干物质和养分累积遵循“S”型曲线,养分吸收累积速度慢于干物质累积。干物质和养分累积在移栽后30~60 d最快,其中移栽后50~60 d的干物质、氮、磷、钾累积量分别是总累积量的40%、33%、32%和37%。整株来看,叶部干物质、氮、磷、钾累积量最高,分别占整株的50.7%、70.2%、58.3%和57.0%;茎秆次之,分别为32.2%、20.1%、29.2%和32.0%;根部最低,分别为17.1%、9.7%、12.5%和11.0%。

This study investigated the accumulation of dry matter,nitrogen,phosphorus and potassium in main cigar varieties of Lai⁃feng County through the high-density sampling in the field to provide basic data for subsequent rational fertilization and production quality control.The results showed that the accumulation of dry matter and nutrients followed an“S”curve,and the absorption and ac⁃cumulation rate of nutrients was slower than that of dry matter.Dry matter and nutrient accumulation were fastest in 30~60 days after transplanting,of which the total accumulation of dry matter,nitrogen,phosphorus and potassium in 50~60 days after transplanting was 40%,33%,32%and 37%,respectively.In terms of whole plants,the accumulation of dry matter,nitrogen,phosphorus and po⁃tassium in the leaves was the highest,accounting for 50.7%,70.2%,58.3%and 57.0%of the whole plant,respectively,followed by the stems and accounting for 32.2%,20.1%,29.2%and 32.0%,and the roots were the lowest,which were 17.1%,9.7%,12.5%and 11.0%of the whole plant,respectively.