Short-term Effect of Different Rate of Biochar Application on Root Development of Hevea brasiliensis

doi:10.3969/j.issn.1000-2561.2019.06.001

Abstract

Abstract:

The short-term effect of four rates of biochar on the root growth of rubber trees (Hevea brasiliensis) were investigated. The contents of soil organic matter, total N, available phosphorus and potassium, and the soil pH were all promoted by the application of biochar. However, soil bulk density decreased using the biochar. In addition, the weight, length, surface area and volume of root were affected in different trends by different amount application of biochar, i.e. compared to CK, the short-term effect of biochar application only at the content of 5% had significantly increased root weight, length, surface area and volume of H. brasiliensis, and there were no significant effects on these items by application of other contents with 1%, 10% or 15%. Meanwhile, the weight of fine root was accounted for 64.8%-76.1% of the total weight of root. Based on the above results, it indicated that the application amount of biochar to have better short-term effect on the growth promotion of the roots of H. brasiliensis was 5%.

Key words: biochar, rubber tree, root system, soil nutrient

CLC Number:

S794.1

BEI Meirong,HUANG Yanyan,JING Yudan,CHA Zhengzao,LIN Qinghuo,LUO Wei. Short-term Effect of Different Rate of Biochar Application on Root Development of Hevea brasiliensis[J]. Chinese Journal of Tropical Crops, 2019, 40(6): 1041-1045.

Figures/Tables 5

References 25

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处理 Treatment	根长Root length/cm		根表面积Root surface/cm²		根体积Root volume/cm³
处理 Treatment	吸收根 Fine root	非吸收根 Non-fine root	吸收根 Fine root	非吸收根 Non-fine root	吸收根 Fine root	非吸收根 Non-fine root
CK	4507±812^b	188±33^ab	777±64^b	219±23^a	12.6±1.9^b	4.33±1.2^a
1% BF	4791±1038^b	211±36^ab	911±128^b	250±43^a	16.5±2.8^ab	5.33±1.1^a
5% BF	6865±889^a	216±19^ab	1276±93^a	268±34^a	20.5±2.2^a	6.41±1.6^a
10% BF	4904±1209^b	163±21^b	839±89^b	220±22^a	13.3±2.1^b	4.38±0.9^a
15% BF	2816±556^c	251±44^a	762±101^b	213±33^a	12.8±3.3^b	6.94±1.9^a

处理 Treatment	根长Root length/cm		根表面积Root surface/cm²		根体积Root volume/cm³
处理 Treatment	吸收根 Fine root	非吸收根 Non-fine root	吸收根 Fine root	非吸收根 Non-fine root	吸收根 Fine root	非吸收根 Non-fine root
CK	4507±812^b	188±33^ab	777±64^b	219±23^a	12.6±1.9^b	4.33±1.2^a
1% BF	4791±1038^b	211±36^ab	911±128^b	250±43^a	16.5±2.8^ab	5.33±1.1^a
5% BF	6865±889^a	216±19^ab	1276±93^a	268±34^a	20.5±2.2^a	6.41±1.6^a
10% BF	4904±1209^b	163±21^b	839±89^b	220±22^a	13.3±2.1^b	4.38±0.9^a
15% BF	2816±556^c	251±44^a	762±101^b	213±33^a	12.8±3.3^b	6.94±1.9^a

处理 Treatment	有机质 Organic matter/ (g?kg^-1)	全氮 Total nitrogen/ (g?kg^-1)	速效磷 Available phosphorus/ (mg?kg^-1)	速效钾 Available potassium/ (mg?kg^-1)	容重 Bulk density/ (g?cm^-3)	pH
CK	12.3±1.1^c	0.54±0.05^b	58.7±8.8^c	47.4±6.4^c	1.41±0.07^a	4.63±0.07^c
1% BF	17.8±3.5^c	0.59±0.10^b	62.6±4.4^c	59.3±6.5^c	1.27±0.03^b	4.70±0.15^c
5% BF	33.8±3.1^b	0.87 ±0.05^ab	86.2±5.2^b	138.5±27.9^bc	1.24±0.04^bc	5.29±0.30^bc
10% BF	41.6±1.9^b	0.90±0.10^a	109.4±7.8^a	199.9±35.4^ab	1.19±0.02^c	5.95±0.22^ab
15% BF	55.4±4.5^a	1.19±0.11^a	116.0±10.1^a	302.1±60.5^a	1.11±0.02^d	6.28±0.22^a

处理 Treatment	有机质 Organic matter/ (g?kg^-1)	全氮 Total nitrogen/ (g?kg^-1)	速效磷 Available phosphorus/ (mg?kg^-1)	速效钾 Available potassium/ (mg?kg^-1)	容重 Bulk density/ (g?cm^-3)	pH
CK	12.3±1.1^c	0.54±0.05^b	58.7±8.8^c	47.4±6.4^c	1.41±0.07^a	4.63±0.07^c
1% BF	17.8±3.5^c	0.59±0.10^b	62.6±4.4^c	59.3±6.5^c	1.27±0.03^b	4.70±0.15^c
5% BF	33.8±3.1^b	0.87 ±0.05^ab	86.2±5.2^b	138.5±27.9^bc	1.24±0.04^bc	5.29±0.30^bc
10% BF	41.6±1.9^b	0.90±0.10^a	109.4±7.8^a	199.9±35.4^ab	1.19±0.02^c	5.95±0.22^ab
15% BF	55.4±4.5^a	1.19±0.11^a	116.0±10.1^a	302.1±60.5^a	1.11±0.02^d	6.28±0.22^a

指标 Item	有机质 Organic matter	全氮 Total nitrogen	速效磷 Available phosphorus	速效钾 Available potassium	容重 Bulk density	pH
根重Root weight	-0.14^ns	-0.10^ns	-0.22^ns	-0.27^ns	0.01^ns	-0.27^ns
根长Root length	-0.35^ns	-0.36^ns	-0.32^ns	-0.48^ns	0.32^ns	-0.40^ns
根表面积Root surface	-0.06^ns	-0.02^ns	-0.11^ns	-0.19^ns	0.00^ns	-0.17^ns
根体积Root volume	-0.14^ns	-0.10^ns	-0.22^ns	-0.27^ns	0.01^ns	-0.27^ns