Root length and distribution of field-grown buckwheat (Fagopyrum esculentum Moench)
Root length and distribution of field-grown buckwheat (Fagopyrum esculentum Moench)
复制标题
田间种植的荞麦 (Fagopyrum esculentum Moench) 的根长和分布
DOI：
10.1080/00380768.2002.10409245
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Seishi Yoshida
中科院分区：
文献类型：
--
作者：
T. Murakami;S. Murayama;M. Uchitsu;Seishi Yoshida
摘要研究了田间荞麦根系的季节变化。将生根土壤体积收集在1 L土壤块中至40 cm深，并通过煮沸将根与土壤分离。根长的确定采用改进的直线相交法。根长不断增加，直到开花高峰期，然后没有增加，在收获时达到18.9 km m−2的值，相当于表面积为4.1 m−2 m−2，平均长度密度为4.7 cm cm−3。细根直径随生长阶段从83 μm减小到66 μm，长度/干重比从849 m g-1增加到1，199 m g-1。根长密度在0-10 cm和/或10-20 cm土层中最高，在此深度以下降低。每单位根长的养分吸收量在生长早期最高，N为0.51 mg m−1，在花芽至盛花期最高，P为0.12 mg m−1。必须选择含有少量碎片的田地进行根部研究，因为清除大量碎片是费力的。
Abstract We determined the seasonal changes in the root system of field-grown buckwheat (Fagopyrum esculentum Moench). Rooting soil volume was collected in 1 L soil blocks to a 40 cm depth, and roots were separated from soil by boiling. The root length was determined by the modified line intersect method. Root length increased constantly until peak flowering, then did not increase, reaching a value of 18.9 km m−2 at harvest, corresponding to a surface area of 4.1 m−2 m−2 and an average length density of 4.7 cm cm−3. The fine root diameter decreased from 83 to 66 μm with the growth stage and the length/ dry weight ratio increased from 849 to 1,199 m g−1. Root length density was highest in the 0–10 cm and /or 10–20 cm soil layers and decreased below this depth. Nutrient uptake per unit root length was highest at the early growth stage, 0.51 mg m−1 for N and highest at the flower budding to peak flowering stages, 0.12 mg m−1 for P Constraints on methodologies such as debris removal and labor reduction were outlined. A field containing few debris must be selected for root studies because the removal of a large amount of debris is laborious.