摘要
1．地膜蔗+1叶氮、磷、钾含量以苗期最高，以后随株龄增加而缓慢下降、伸长期氮含量和工艺成熟初期磷，钾含量略有回升，达第二个高峰值，之后，+1叶氮、磷、钾含量迅速下降，成熟期达最低值。2．一张叶片一生的氮、磷、钾含量随株龄增加而不断减少，生长旺盛的+1叶片至+3叶氮、磷、钾含量较高，干枯叶片氮、磷钾含量很少。3．甘蔗叶片的氮、磷、钾具有极强的运转能力，干枯时叶片只保留很低的氮、磷、钾含量，前期吸收较多的矿质营养元素，在完成其生理机能之后，除了构成植株组织外，大部分向新生组织转移，氮、磷、钾肥料的利用率是较高的。
1. The contents 0f Nitrogec (N), Phosphorus (P) and p0lassium (K) in + 1 leaf were the highesl at seedling stage, and decreased slightly WIth growth afterward. Both contents 0f at vigorous elongating stage and P. K at the beginning of technical maturing state in +1 leaf rised sligtly, and reached. The second peak anddeclined rapidly afterward. The contents 0f N,P and K in +1 leaf were the lowest at ripening stage. 2. The contents of N,P and K in a leaf appeared to be declined with growth, those in the ten-der leaves (+ 1- +3)were higher as compared to those in the aged-leaves.3. The ability for transporation of N. P- K was powerfuI in sugarcane leaves. Most of the N.P. K uptaked at early Stage could be transported from the aged-leaves to the tender organizations with growth except that little part in aged-leaves wasa composed to its structure, and the aged -leaves only maintained very low level of N. P. K. The utilized coefficent of N. P. K in leaves was very high during the growing stage.
出处
《甘蔗糖业》
1995年第2期10-15,共6页
Sugarcane and Canesugar
