南京农业大学学报2017，Vol.40Issue(3)：473-480,8.DOI:10.7685/jnau.201604056
连续5年施用生物有机肥对梨树根系形态及分布的影响
Effect of continuous application of bio-organic fertilizer for five years on the morphology and distribution of pear roots
摘要
Abstract
[Objectives] This paper was aimed to investigate the influence of continual supplied bio-organic fertilizer for five years on the root morphology and distribution of' Huangguan' pear,with provides theoretical basis for high efficiency fertilization in pear orchard.[Methods] The experiment was designed with two fertilizer types,i.e.,chemical fertilizers (TF)and biological organic fertilizer(BOF),and a non-fertilizer control(CK) on 15-year old' Huangguan' pear trees.All fertilizers were supplied by annular fertilization method,and 20 soil units with 40 cm×40 cm×30 cm were collected in the range of 0-200 cm(horizontal distance)from the trunk and 0-120 cm (vertical distance)after fruit harvest.The characteristics of length,surface area and volume of different diameter pear tree roots on the horizontal and vertical directions were investigated.[Results] The total root length,total root tip numbers,total root surface area and total root volume of pear roots were the most in BOF,followed by TF,and the least in CK.Compared to control,the total root length,total root tip numbers,total root surface area and total root volume of BOF treatments increased by 71.8％,50.8％,89.9％ and 130.1％,respectively,and increased 28.0％,8.3％,37.0％ and 61.5％,respectively,compared to TF.The root length,root surface area and root volume in different diameter roots were also the most for BOF,and the least for the CK.The pear tree roots mainly distributed in the range of 0-120 cm (horizontal distance)from the trunk of 0-90 cm (vertical distance)in all treatments.BOF significantly increased the root tip number and promoted the growth of fine roots (＜ 1 mm) in the area of vertical depth 0-60 cm;and promoted the growth of 1-3 mm roots in the area of vertical depth 0-90 cm;the growth of thick roots (＞ 3 mm)were significantly promoted between vertical depth 60-90 cm.BOF improved the content of soil organic matter,available potassium,available N and available phosphorus in soil depth 0-60 cm [Conclusions] Bio-organic fertilizer can significantly promote the growth of different diameter pear tree roots on different depth,which is conducive to improving the uptake of nutrient and water.关键词
梨树/根系形态/根系分布/生物有机肥Key words
pear/root morphology/root distribution/bio-organic fertilizer分类
农业科技引用本文复制引用
伍从成,姜海波,赵静文,范学山,董彩霞,沈其荣,徐阳春..连续5年施用生物有机肥对梨树根系形态及分布的影响[J].南京农业大学学报,2017,40(3):473-480,8.基金项目
国家现代农业(梨)产业技术体系项目(CARS-29-15) （梨）
国家公益性行业(农业)科研专项(201203013) （农业）
