核农学报2018，Vol.32Issue(1)：188-195,8.DOI:10.11869/j.issn.100-8551.2018.01.0188
施肥对日光温室香瓜茄根系生长及形态的影响
Effects of Organic Fertilizer Manure on Growth and Morphology of Roots of Pepino
摘要
Abstract
To study the effect of different fertilization regimes on root growth dynamics of pepino (Solanum murcatum),the dry weight of plant organ,root morphological parameters such as root length density (RLD),root surface area density (RSAD),root diameter (RD),root volume density (RVD) and root tip number (RTN) were determined in situ with the minirhizotrons technique during pepino developmental stages.Additionally,fruit traits were observed at first harvest stage under two fertilization regimes.The results showed that the root biomass,RLD,RSAD,RVD and RTN increased significantly with the growth of pepino plants,however,the relative growth rate increased to the maximum at stage of shoot elongation,and then decreased.RLD,RSAD and NRT distribution transferred from upper layer of the soil profile to deeper soil volume at flowering stage,when the root dry weight increased most significantly with maximum daily increase rate of 177.5 mg· plant-1(organic fertilizer) and 117.5 mg·plant-1(no fertilizer).Root growth of pepino plants responded notably to fertilization,the root/shoot ratio,root biomass,RLD,RSAD and NRT in plots applying organic fertilizer were significantly higher than those under non-fertilization at all but the seedling stage.Daily increase rate of root biomass and relative increase rates of root morphological parameters under organic fertilizer were significantly higher than those under no fertilizer.There were significant positive correlations among root dry weight and morphological indicators in fertilizing and non-fertilization treatments.Under fertilization treatments,negative correlations were found between root morphology and fruit yield traits.The quickest root growth stage of pepino was found from the shoot elongation to flowering stage,and application of organic fertilizer contributed to the faster root growth,more concentrated growth duration and higher distribution ratio in upper soil profile,while non-fertilization induced longer root growth duration and deeper root distribution.This study provided a theoretical basis for the scientific fertilization of pepino.关键词
香瓜茄/施肥/根系/形态Key words
pepino/fertilization/root/morphology引用本文复制引用
冯云格,陈菁菁,孙小妹,王斌杰,陈年来..施肥对日光温室香瓜茄根系生长及形态的影响[J].核农学报,2018,32(1):188-195,8.基金项目
甘肃省农业生物技术研究与应用开发 （）
