引用本文:王世佳,蒋代华,朱文国,张蓉蓉,李军伟,韦本辉.粉垄耕作对农田赤红壤团聚体结构的影响[J].土壤学报,2020,57(2):326-335. DOI:10.11766/trxb201902110023
WANG Shijia,JIANG Daihua,ZHU Wenguo,ZHANG Rongrong,LI Junwei,WEI Benhui.Effect of Deep Vertical Rotary Tillage on Aggregate Structure in Farmland of Lateritic Red Soil[J].Acta Pedologica Sinica,2020,57(2):326-335. DOI:10.11766/trxb201902110023
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 163次   下载 102 本文二维码信息
码上扫一扫!
分享到: 微信 更多
粉垄耕作对农田赤红壤团聚体结构的影响
王世佳1, 蒋代华1, 朱文国1, 张蓉蓉1, 李军伟1, 韦本辉2
1.广西大学农学院;2.广西农业科学院经济作物研究所
摘要:
为揭示粉垄耕作对土壤团聚体结构的影响,探明其变化机理,通过团粒分析、扫描电镜(SEM)、Brunauer-Emmett-Teller(BET)比表面积及孔径分析等表征手段对赤红壤进行形貌和结构分析,结合耕作后土壤养分的变化,分析比较了常规旋耕(CT20)、深翻旋耕(DT40)、粉垄20 cm(FL20)和粉垄40 cm(FL40)四种耕作方式下赤红壤理化特性的变化。结果表明:FL40相对其他耕作方式,增加了1~0.25 mm粒径机械稳定性团聚体含量(P<0.05),减少了大于3 mm粒径水稳性团聚体含量(P<0.05)。相对于CT20和DT40,粉垄耕作处理土壤微形态改变呈现出骨骼颗粒细小且排列紧密、表面光滑、土壤比表面积较大、孔隙分布更丰富等特点;DT40速效养分含量较CT20、FL20和FL40均达到显著差异(P<0.05)。相对于CT20和DT40,粉垄耕作能增加赤红壤的中团聚体含量,使赤红壤形态特征存在明显差异;其中,FL20使作物增产显著。
关键词:  粉垄  团聚体  微形态  孔隙分布  土壤养分
基金项目:广西科技重大专项(桂科AA17204037-3)资助
Effect of Deep Vertical Rotary Tillage on Aggregate Structure in Farmland of Lateritic Red Soil
WANG Shijia1, JIANG Daihua1, ZHU Wenguo1, ZHANG Rongrong1, LI Junwei1, WEI Benhui2
1.College of Agriculture, Guangxi University;2.Institute of Economic Crops of Guangxi Academy of Agricultural Sciences
Abstract:
【Objective】 In order to expose influence of deep vertically rotary tillage (DVRT) technology on aggregate structure, and explore mechanism of the change, in-lab analyses of soil samples were carried out in this study. 【Method】 Soil samples were collected from farmlands of latosolic red soil different in tillage, conventional rotary tillage 20 cm deep (CT20), deep tilling 40 cm deep (DT40), DVRT 20cm deep (FL20) or DVRI 40 cm deep (FL40), were studied by means of aggregate analysis, scanning electron microscopy (SEM), brunauer-emmett-teller (BET) specific surface area analysis and pore size analysis for differences in morphology and structure of the soil before and after tillage and between the treatments of tillage. Changes in nutrient status and physicochemical properties of the latosolic red soil after tillage were analyzed and compared. 【Result】Results show that FL40 increased the content of mechanical stability aggregates, 1~0.25 mm in particle size (P<0.05) and decreased the content of water stability aggregates, >3 mm in particle size (P<0.05) as compared with other tillage methods. Compared with CT20 and DT40, FL (either FL20 or FL40) changed the soil in micro-morphology to have skeletal grains fine, closely arrayed and smooth in surface, and to be higher in soil specific surface area and more extensive in pore distribution. DT40 differed significantly from the other treatments in available nutrient content (P<0.05). 【Conclusion】Compared with CT20 and DT40, FL (either FL20 or FL40) can increase the content of aggregates in latosolic red soil, and changed the micromorphology of latosolic red soil significantly, and FL20 can increase crop yield significantly.
Key words:  Deep vertically rotary tillage  Aggregate  Micromorphology  Pore distribution  Soil nutrient