Soil related limitation to crop production in the semiarid Northeast of Brazil: identification and modeling
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Stuttgart
Inst. für Bodenkunde und Standortslehre
2002
|
| Schriftenreihe: | Hohenheimer bodenkundliche Hefte
64 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | Zugl.: Hohenheim, Univ., Diss., 2002 |
| Beschreibung: | 104 S. Ill., graph. Darst. : 21 cm |
Internformat
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Datensatz im Suchindex
| _version_ | 1804129848388485120 |
|---|---|
| adam_text | Titel: Soil related limitation to crop production in the semiarid northeast of Brazil
Autor: Barros, Inácio de
Jahr: 2002
Table of contents
Table of contents
1 Introduction and problem definition............................................................ 1
1.1 Introduction....................................................................................... 1
1.2 Problem definition and objectives.............................................................. 2
2 Identification of the soil related limitations for maize-cowpea mixed cropping in
the semi-arid NE of Brazil......................................................................... 3
2.1 State of art......................................................................................... 3
2.2 Objectives.......................................................................................... 4
2.3 Material and methods............................................................................ 5
2.3.1 Experiment on Alumi-Haplic Acrisol.................................................... 5
2.3.2 Experiment on Chromic Luvisol.......................................................... 6
2.3.3 Collected data................................................................................ 7
2.3.4 Root development........................................................................... 7
2.4 Results and discussion........................................................................... 8
2.4.1 Climatic conditions during the experimental period.................................... 8
2.4 2 Biomass production and yield............................................................. 9
2.4.2.1 Results................................................................................. 9
2.4.2.2 Discussion............................................................................. 15
2.4.3 Nutrient uptake............................................................................... 24
2.4.3.1 Results................................................................................. 24
2.4.3.2 Discussion............................................................................. 28
2.4.4 Root development............................................................................ 37
2.4.4.1 Results................................................................................. 37
2.4.4.2 Discussion............................................................................. 40
2.5 Conclusions........................................................................................ 43
3 Modeling soil nutrient limitations to crop growth, yield and nutrient uptake in the
semi-arid NE of Brazil with EPIC (Erosion/Productivity Impact Calculator) crop
model................................................................................................... 47
3.1 Introduction........................................................................................ 47
3.1.1 EPIC (Erosion/Productivity Impact Calculator) crop model as tool to simulate
agricultural production...................................................................... 48
3.1.2 Problem definition and objectives......................................................... 49
3.2 Changes in the source code of EPIC........................................................... 50
3.2.1 A simplified soil and plant K model....................................................... 50
3.2.1.1 Model structure....................................................................... 51
3.2.1.2 K losses-leaching, surface runoff, lateral subsurface flow.................... 51
3.2.1.3K transport by soil water evaporation.............................................. 53
3.2.1.4 Mineral K application as fertilizer.................................................. 53
3.2.1.5 Transfer between the soil K pools.................................................. 53
3.2.1.6 K release from crop residues......................................................... 55
3.2.1.7 K uptake by crops..................................................................... 55
3.2.1.8 Effect of K uptake on biomass production........................................ 56
3.2.2 Growth constraints........................................................................... 56
3.2.3 Manual liming................................................................................. 57
Table of contents
3 2.4 Effects of Na exchangeable percent on the soil strength stress factor and
saturated hydraulic conductivity........................................................... 58
3 2.5 Calculations of Al saturation as a function of the soil pH, organic C and base
saturation........................................................................................ 59
3.2.6 Calculations of N stress factor for plant growth......................................... 60
3.2.7 Calculations of the labile P factor for plant uptake...................................... 61
3 2.8 Calculations of P stress factor for plant growth......................................... 61
3 3 Field test of the model............................................................................ 63
3.3.1 Methods....................................................................................... 63
3.3.2 Results......................................................................................... 65
3.3.3 Discussion.................................................................................... 69
4 General discussion................................................................................... 75
5 Summary, Zusammenfassung, Resumo.........................................................- 79
5.1 Summary........................................................................................... 79
5.2 Zusammenfassung................................................................................. 82
5.3 Resumo............................................................................................ 85
6 References.............................................................................................. 88
7 Acknowledgements.................................................................................. 104
|
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| spelling | Barros, Inácio de Verfasser aut Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling Inácio de Barros Stuttgart Inst. für Bodenkunde und Standortslehre 2002 104 S. Ill., graph. Darst. : 21 cm txt rdacontent n rdamedia nc rdacarrier Hohenheimer bodenkundliche Hefte 64 Zugl.: Hohenheim, Univ., Diss., 2002 Pflanzenproduktion (DE-588)4251085-5 gnd rswk-swf Bodenkunde (DE-588)4007379-8 gnd rswk-swf Semiarides Gebiet (DE-588)4137761-8 gnd rswk-swf Brasilien Nordost (DE-588)4089953-6 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Brasilien Nordost (DE-588)4089953-6 g Semiarides Gebiet (DE-588)4137761-8 s Bodenkunde (DE-588)4007379-8 s Pflanzenproduktion (DE-588)4251085-5 s DE-604 Hohenheimer bodenkundliche Hefte 64 (DE-604)BV035362756 64 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=010218120&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Barros, Inácio de Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling Hohenheimer bodenkundliche Hefte Pflanzenproduktion (DE-588)4251085-5 gnd Bodenkunde (DE-588)4007379-8 gnd Semiarides Gebiet (DE-588)4137761-8 gnd |
| subject_GND | (DE-588)4251085-5 (DE-588)4007379-8 (DE-588)4137761-8 (DE-588)4089953-6 (DE-588)4113937-9 |
| title | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling |
| title_auth | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling |
| title_exact_search | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling |
| title_full | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling Inácio de Barros |
| title_fullStr | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling Inácio de Barros |
| title_full_unstemmed | Soil related limitation to crop production in the semiarid Northeast of Brazil identification and modeling Inácio de Barros |
| title_short | Soil related limitation to crop production in the semiarid Northeast of Brazil |
| title_sort | soil related limitation to crop production in the semiarid northeast of brazil identification and modeling |
| title_sub | identification and modeling |
| topic | Pflanzenproduktion (DE-588)4251085-5 gnd Bodenkunde (DE-588)4007379-8 gnd Semiarides Gebiet (DE-588)4137761-8 gnd |
| topic_facet | Pflanzenproduktion Bodenkunde Semiarides Gebiet Brasilien Nordost Hochschulschrift |
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