| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
a Dep. of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824
b SW Kansas Research and Extension Center, Kansas State University, KS 67846
c Statistical Consulting Service, College of Agricultural and Natural Resources, Michigan State University
* Corresponding author (sanche22{at}msu.edu)
The development of sustainable N management systems requires a better understanding of the contribution of on-farm resources to the active N pool size and its mineralization. This study explores the effect of substrate diversity on improving N supply through mineralization. A "diverse system", consisting of a corn (Zea mays L.)-corn–soybean (Glycine max L.)-wheat (Triticum aestivum L.) rotation with cover crops and fertilized with composted manure was compared with a corn monoculture with conventional fertilizers. Nitrogen mineralization was measured in situ and in laboratory incubations as was the ability of each soil to mineralize added compost and red clover (Trifolium pratense) residue in the 6th and 7th yr of rotation. Net mineralized N in the diverse system was 90 and 40% higher than that in the monoculture at 70 and 150 d of laboratory incubations respectively. Comparable response was found in situ where a 70% higher net mineralization was observed in the diverse system at 70 d. The 70- and 150-d mineralizable N pools increased over time, but the ability of soil organisms to break down additional substrate did not change as a result of system diversity. At 150 d of laboratory incubation, a synergistic effect was observed when 5 Mg ha-1 of compost plus 5 Mgha-1 of clover was added to either soil. The combination of the two organic materials mineralized more N than the sum of their individual mineralization results. A more diverse cropping system may increase the soil's capacity to supply N to a growing crop while maintaining desirable levels of soil organic matter. This is essential for the overall long-term productivity and sustainability of agricultural systems.
This article has been cited by other articles:
|
|
 |
|
  E. B. Mallory and T. S. Griffin Impacts of Soil Amendment History on Nitrogen Availability from Manure and Fertilizer Soil Sci. Soc. Am. J., May 16, 2007; 71(3): 964 - 973. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. G. Kravchenko and K. D. Thelen Effect of Winter Wheat Crop Residue on No-Till Corn Growth and Development Agron. J., March 12, 2007; 99(2): 549 - 555. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. E. Russell, D. A. Laird, and A. P. Mallarino Nitrogen Fertilization and Cropping System Impacts on Soil Quality in Midwestern Mollisols Soil Sci. Soc. Am. J., January 6, 2006; 70(1): 249 - 255. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. S. Snapp, S. M. Swinton, R. Labarta, D. Mutch, J. R. Black, R. Leep, J. Nyiraneza, and K. O'Neil Evaluating Cover Crops for Benefits, Costs and Performance within Cropping System Niches Agron. J., January 1, 2005; 97(1): 322 - 332. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. E. Sanchez, R. R. Harwood, T. C. Willson, K. Kizilkaya, J. Smeenk, E. Parker, E. A. Paul, B. D. Knezek, and G. P. Robertson Managing Soil Carbon and Nitrogen for Productivity and Environmental Quality Agron. J., May 1, 2004; 96(3): 769 - 775. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. E. Sanchez, E. A. Paul, T. C. Willson, J. Smeenk, and R. R. Harwood Corn Root Effects on the Nitrogen-Supplying Capacity of a Conditioned Soil Agron. J., May 1, 2002; 94(3): 391 - 396. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
