无花类型藕莲品种产量形成与需肥特性的初步研究

THE PRELIMINARY STUDY ON FORMATION OF YIELD AND CHARACTERISTIC OF NEEDING FERTILIZERS OF LOTUS RHIZOME WITHOUT FLOWER

本文研究了花藕的产量形成过程及需肥特性。结果表明,藕莲植株前期进行营养生长,后期转入贮藏生长,以其后栋叶的出现为标志。新藕的形成、膨大过程在7月16日至8月20日,历时约35天,其中包含一个快速增长期。结藕以前,体内同化产物主要分配给茎叶,用于开源;结藕后,主要分配到藕中,用于扩库,其间发生了生长中心的转移。并初步探明藕莲生育期中对N、 P、K吸收量的变化趋势,其吸收比约为2.73:1:5.2。

Experiments were completed on the local cultivar 'Hua-ou' of lotus rhizome in Jiang Su province. The forming and swelling process and needing fertilizer of lotus rhizome were investigated. The results are as follows. When the main stem of the plant of 'Hua-ou' grows out the highest and biggest leaf. The lotus plant turns to store growth from the nutrient growth. The forming period of lotus rhizome of 'Hua-ou' is lasted 35 days from July 16 to August 20. Before lotus be formed. There is a rapid growing period. In this period, the dry material mainly distributed into leaves and stems. After lotus rhizome beginning to form, the dry material mainly distributed into the rhizome. The changes in absorbing amount and the final absorbing ratio of N:P:K by lotus plant were preliminarily clarified. The final absorbing ratio of N:P:K by lotus plant is about 2.73'.1'.5.2. This result provided some scientific reference for applying fertilizer to lotus plant.