Green manuring with clover and ryegrass catch crops undersown in spring wheat: Effects on soil structure

被引:25
作者
Breland, TA
机构
[1] Agricultural University of Norway, Department of Biotechnological Sciences, N-1432
关键词
cover crops; green manures; aggregates; stability; pore volume; bulk density;
D O I
10.1111/j.1475-2743.1995.tb00950.x
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
The objective of the present study was to investigate the potential of undersown catch crops to counteract soil degradation after autumn ploughing. Italian ryegrass (Lolium multiflorum Lam.) and white clover (Trifolium repens L.) were undersown in spring wheat on a loam soil in southern Norway, allowed to grow as cover crops after grain harvest and ploughed in to 20 cm depth as green manure in late October. Ryegrass prevented a collapse of the ridged plough furrow profile during winter, which occurred on gain monoculture and white-clover plots. Also, it tended to improve the water stability of aggregates, aggregate size distribution, bulk density, and pore volume in soil sampled in May. The preservation of the plough furrow profile was mainly attributed to enmeshment by an extensive system of fine roots and less to rhizosphere and microbial effects on aggregate stability. The results showed that ryegrass catch crops may give rapid structure improvements that are likely to contribute appreciably to easier seedbed preparation and less soil degradation in arable farming systems, even if the soil is ploughed in autumn.
引用
收藏
页码:163 / 167
页数:5
相关论文
共 36 条
[1]   SIGNIFICANCE OF MICROORGANISMS IN AGGREGATE FORMATION [J].
ANDERSON, TH .
ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE, 1991, 154 (06) :409-416
[2]  
BOELS D, 1982, SOIL DEGRADATION
[3]   MICROBIAL-GROWTH AND NITROGEN IMMOBILIZATION IN THE ROOT ZONE OF BARLEY (HORDEUM-VULGARE L), ITALIAN RYEGRASS (LOLIUM-MULTIFLORUM LAM), AND WHITE CLOVER (TRIFOLIUM-REPENS L) [J].
BRELAND, TA ;
BAKKEN, LR .
BIOLOGY AND FERTILITY OF SOILS, 1991, 12 (02) :154-160
[4]   MEASURED AND PREDICTED MINERALIZATION OF CLOVER GREEN MANURE AT LOW-TEMPERATURES AT DIFFERENT DEPTHS IN 2 SOILS [J].
BRELAND, TA .
PLANT AND SOIL, 1994, 166 (01) :13-20
[5]   ENHANCED MINERALIZATION AND DENITRIFICATION AS A RESULT OF HETEROGENEOUS DISTRIBUTION OF CLOVER RESIDUES IN SOIL [J].
BRELAND, TA .
PLANT AND SOIL, 1994, 166 (01) :1-12
[6]  
BRELAND TA, 1995, PLANT SOIL
[7]  
BRELAND TA, 1995, IN PRESS ACTA AGR B
[8]   THE MICROBIOLOGY OF SOIL STRUCTURE [J].
BURNS, RG ;
DAVIES, JA .
BIOLOGICAL AGRICULTURE & HORTICULTURE, 1986, 3 (2-3) :95-113
[9]   EFFECT OF UNDERSOWING BARLEY WITH ANNUAL RYEGRASSES OR RED-CLOVER ON SOIL STRUCTURE IN A BARLEY-SOYBEAN ROTATION [J].
CARTER, MR ;
KUNELIUS, HT .
AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 1993, 43 (3-4) :245-254
[10]   THE EFFECT OF SOIL AGGREGATE SIZE ON EARLY SHOOT AND ROOT-GROWTH OF MAIZE (ZEA-MAYS-L) [J].
DONALD, RG ;
KAY, BD ;
MILLER, MH .
PLANT AND SOIL, 1987, 103 (02) :251-259