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李毅杰; 梁强; 董文斌; 陈泉; 刘晓燕; 谢金兰; 李长宁; 王维赞; 李杨瑞
Source Publication西南农业学报
Abstract【目的】探明机械操作引起的土壤压实对宿根甘蔗出苗及根系形成的影响,为优化甘蔗机械化栽培方法和评价适宜机械化栽培的甘蔗品种提供理论参考。【方法】试验采用双因素随机区组设计,其中一个因子为碾压(机械碾压处理;对照),另外一个因子为甘蔗品种(ROC22、GT42、GT43、GT30、GT03-2287和GT98-296)。收获后调查农艺性状及根系的功能属性参数。【结果】机械碾压后,10~ 20 cm土层容重增幅最大,土壤紧实度随土层加深而增加,在40 cm时处理和对照的土层压强趋于一致; GT42、GT43和GT98-296等品种的出苗数和株高均高于其它品种;根系干重、根系长度、根系表面积和根系平均直径均不同程度下降,根系干重变化幅度与其数值大小呈负相关;所有参试品种一级根系比例增加,二级、三级和四级根系的比例均不同程度下降。【结论】机械碾压增加蔗地土壤紧实度,限制了宿根甘蔗的根系生长,进而影响植株的生长。不同品种适应紧实胁迫的能力存在差异,在使用大型收获机械进行甘蔗生产时应选用宿根出苗能力强且根系发达的品种。; 【Objective】In order to provide theoretical reference for optimizing methods of sugarcane mechanized cultivation and suitable varieties evaluation,the experiment was conducted to study the effect of mechanical compaction on seedling emergence and roots formation of ratoon sugarcane.【Method】The randomized block designed with two factors,one factor contained the mechanical compaction treatments and the control,and the other factor was consist of different varieties,which were ROC22,GT42,GT43,GT30,GT03-2287 and GT98-296. Agronomic characters and functional properties parameters of roots were investigated at post-harvest.【Result】After mechanical roller compaction, the increase amplitude in soil bulk density was the highest at 10-20 cm depth,and soil compaction augmented with the increase of soil depth. The soil pressure of the treatment and the control tended to be consistent when the soil depth reached 40 cm. The number of seedling emergence and the plant height in GT42,GT43 and GT98-296 were higher than the other tested varieties. The dry weight,the length,the superficial area and the mean diameter of roots decreased in different degrees,respectively. The change range of the dry weight of roots was negative correlation with its numerical value. Though the proportion of the second order roots,the third order roots and the fourth order roots decreased in different degrees,respectively,the proportion of the first order roots increased in all tested varieties.【Conclusion】The soil compaction increased after mechanical roller compaction,which limited the growth of roots and affected the growth of ratoon sugarcane. The ability of different varieties to adapt soil compaction stress was different. The varieties with strong ratoon seedling emergence ability and developed roots system should be selected when large harvest machines were used in sugarcane production.
Subject AreaAgriculture (Provided By Clarivate Analytics)
Document Type期刊论文
Recommended Citation
GB/T 7714
李毅杰,梁强,董文斌,等. 土壤压实对宿根甘蔗出苗及根系形成的影响[J]. 西南农业学报,2017,30(9):2041-2047.
APA 李毅杰.,梁强.,董文斌.,陈泉.,刘晓燕.,...&李杨瑞.(2017).土壤压实对宿根甘蔗出苗及根系形成的影响.西南农业学报,30(9),2041-2047.
MLA 李毅杰,et al."土壤压实对宿根甘蔗出苗及根系形成的影响".西南农业学报 30.9(2017):2041-2047.
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