Corn and Soybean Response to Wastewater-recycled Phosphorus Fertilizers

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Corn and Soybean Response to Wastewater-recycled Phosphorus
Fertilizers, Is A Well-Researched Topic, It Is To Be Used As A Guide Or Framework For Your Research

ABSTRACT

The ability to recycle phosphorus (P) from wastewaters could provide a sustainable, continuous source of P that might also help protect surface water quality from P enrichment. The mineral struvite (MgNH4PO4·6H2O) is an understudied material that can be created from P-containing wastewater and has been shown to have agricultural fertilizer value. The objective of this study was to evaluate the effects of electrochemically precipitated struvite (ECST), chemically precipitated struvite (Crystal Green; CG), diammonium phosphate (DAP), monoammonium phosphate (MAP), rock phosphate (RP), and triple super phosphate (TSP) on corn (Zea mays) and soybean (Glycine max) response in a 79-day greenhouse pot study. The effects of fertilizer treatment (i.e., ECST, CG, TSP, MAP, DAP, RP, No P/+N, and No P/-N) on select plant and soil properties were evaluated separately by crop (i.e., soybean and corn). Results demonstrated that when a crop response to P fertilization was expected, there were differences in degree of plant response depending on fertilizer-P source. Although soybean plant properties were not, corn plant properties and corn and soybean elemental tissue concentrations differed (P < 0.05) among fertilizer amendments. Total corn dry matter from ECST did not differ from that from RP and TSP and was 1.2 times greater than that from CG. Belowground corn dry matter from ECST was 1.9 times greater than that from CG, TSP, DAP, No P/+N, and No P/-N. Corn cob-plus-husk dry matter from CG and ECST were similar. Corn belowground tissue P concentration from CG did not differ from that from DAP, TSP, and MAP and was 1.4 times larger than that from ECST. Corn cob-plus-husk tissue P concentration from ECST was similar to that from MAP and DAP and was 1.2 times larger than that from CG. Corn stem-plus-leaves tissue P concentration from ECST differed from that from all other treatments and was 1.8 times greater than that from the No P/+N control. Results generated from this study not only provide information on the understudied electrochemically precipitated struvite, but also further reasons why more research should be conducted on not only the implementation of struvite as a fertilizer-P source, but also struvite’s potential impact on sustainable food production and the preservation of water resources.

Table of Contents

Abstract ……………………………………………………………….…………………………. 1
Table of Contents ………………………………………………………………..………………. 2
List of Tables …………………………………………………………………….……………… 3
List of Figures …………………………………………………………………….……………… 4
1. Introduction ………………………………………………………………..…………….. 5
2. Justification …………………………………………………………………..………… 13
3. Objectives and Hypothesis ……………………………………………………………… 14
4. Materials and Methods ………………………………………………………………….. 14
a. Soil Collection, Processing, and Initial Characterization ………………….…… 14
b. Fertilizer Treatment …………………………………………………………….. 16
c. Pot preparation ………………………………………………………………….. 18
d. Pot management ……………………………………………………………..…. 21
e. Plant Measurements …………………………………………………………….. 24
f. Pot Deconstruction …………………………………………………………..…. 25
g. Soil Measurements …………………………………………………………..…. 27
h. Statistical Analyses ………………………………………………………….…. 27
5. Results and Discussion …………………………………………………………………. 28
a. Soybean Response ……………………………………………………….…….. 28
i. Plant Properties …………………………………………………..…….. 28
ii. Tissue Properties …………………………………………………..…… 28
iii. Soil Property Changes …………………………………………………… 33
b. Corn Response ………………………………………………………….……… 38
i. Plant Properties …………………………………………………..…….. 38
ii. Tissue Properties…………………………………………………..….… 41
iii. Soil Property Changes …………………………………………………… 51
6. Implications ………………………………………………………………………..…… 55
7. Conclusions ……………………………………………………………………….……. 56
Acknowledgments ……………………………………………………………………………… 57 References ………………………………………………………………………………….…… 58

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YourPastQuestions Brand

Additional information

Author

Shane Ylagan

No of Chapters

7

No of Pages

84

Reference

YES

Format

PDF

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