Effects of tillage options on soil physical properties and cassava-dry-matter partitioning
文献类型: 外文期刊
作者: Figueiredo, Priscila Gonzales 1 ; Bicudo, Silvio Jose 1 ; Chen, Songbi 3 ; Fernandes, Adalton Mazetti 4 ; Tanama 1 ;
作者机构: 1.Sao Paulo State Univ, Dept Prod & Plant Breeding, Coll Agr Sci, FCA UNESP, POB 237, BR-18610307 Botucatu, SP, Brazil
2.Sao Paulo State Univ, Dept Hort, Coll Agr Sci, FCA UNESP, POB 237, BR-18610307 Botucatu, SP, Brazil
3.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Danzhou 571737, Hainan, Peoples R China
4.UNESP, Ctr Rafzes & Amidos Trop CERAT, POB 237, BR-18610307 Botucatu, SP, Brazil
5.Univ Yaounde I, POB 1664, Yaounde, Cameroon
关键词: Manihot esculenta;Minimum tillage;Conventional tillage;No-tillage
期刊名称:FIELD CROPS RESEARCH ( 影响因子:5.224; 五年影响因子:6.19 )
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收录情况: SCI
摘要: Conservation tillage is efficient at reducing soil degradation, but affects soil physical properties, and leads to soil compaction, negatively impacting root production, and so it is rarely adopted by cassava cultivators. The objective of this study was to evaluate the dry-matter partitioning (DMP) during a full cassava season under different tillage methods. The effects of minimum tillage (MT), conventional tillage (CT) and no-tillage (NT) on soil water content, soil penetration resistance, macroporosity, microporosity and total porosity were evaluated at 70, 120, 230, 300 and 350 days after planting (DAP). Additionally, the DMP in cassava plants was evaluated every 30 days until 360 DAP at Botucatu, Brazil on an Alfisol soil. Our result revealed that the tillage type affected soil penetration resistance, macroporosity and total porosity as well as the dry matter content (DMC) on cassava leaf, stem, root and planted cutting. No significant difference was observed in total DMC. However, DMP differed significantly between 150 and 210 DAP, corresponding respectively to the root-thickening phase end and the dormancy phase beginning. The highest DMC of stem and planted cutting was observed in NT-developed plants. Shoot DMC was positively correlated with soil penetration resistance. CT and MT did not differ in root yield; hence, MT should be adopted instead of CT, as an effort to control soil erosion. NT increases the soil penetration resistance, and results in greater accumulation of DM in the stem and planted cutting than in the roots. Data suggest that increased soil penetration resistance under NT can decrease cassava root growth and induce the stem and planted cutting to play the role of storage organs. (C) 2016 Published by Elsevier B.V.
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