Effect of Soybean and Wheat as Cover Crops on Corn Yield and Weed Control using Different Fertilizer Sources

Document Type : Research Article

Authors

• F. Dadashi
• F. Zaefarian
• R. Abasi
• M. A. Bahmanyar

Sari Agricultural Sciences and Natural Resources University

10.22067/jpp.v29i3.34847

Abstract

Introduction: According to the importance of corn in supplying the human food directly and indirectly, it is one of the most important plants among crops. One of the major problems in corn production systems, is competition with weeds that reduce corn yield significantly. Weeds not only reduce crop yields but also decrease the commercial quality and the feeding palatability of main crops. They enhance the soil seed bank of weeds, which may cause continuous weed infestation of field crops as well. Herbicide application is a reliable and highly effective method for weed control. However, demand for safe food products that have been produced with a minimum application of chemical inputs is increasing. Therefore, farmers interested in weed management have to rely on other control approaches. An alternative weed control method is the use of cover crops, which can suppress the growth of weeds by preventing them from light and by producing allelopathic compounds. Cover crops successfully have been integrated into conservational agriculture systems in many areas of the world. Legumes are used as cover crop because of their rapid growth, in addition their potential to provide further nitrogen,along with high ability to compete with weeds.
Materials and Methods: In order to study the effect of cover crops (soybean and wheat) and different fertilizers sources on yield of corn and weed control, a filed experiment was conducted in randomized complete block design with three replications in 2012. Treatments included two cover crop (wheat and soybean) and three fertilizer (no fertilizer, chemical fertilizer and compost)..Fertilizer treatments was used according to soil analysis and requirement of corn (as a main plant). Weed-infestation and weed-free plots were used as controls. Study cultivars of corn, wheat and soybean were NS-640, Milan and Sari, respectively. Planting of corn was in June and cover crop was planted with corn simultaneously and between corn rows. The dominant weed species were velvetleaf (Abutilon theophrasti Medic.), johnson grass (Sorghum halepense (L.) Pers.), wild melon (Cucumis melo var. agrestis) and giant foxtail (Setaria glauca L.) in the field. In order to determine the dry weight and density of weeds, three-stage sampling was performed from the middle rows of corn. Corn yield was also measured by mechanical harvesting in middle rows and adjusting to 14% moisture. A week before the final harvest, ten plants of corn were selected randomly from the three middle rows of each plot and yield components including the number of rows in corn, number of kernels per row, weight of 1000 grains was measured.
Results and Discussion: The results showed that soybean cover crop reduced weed density compared to control in weed infestated plots, but wheat was not successful in suppressing weeds and reducing their density due to poor biomass and dying at the end of growing season . So, the lowest dry matter of velvetleaf, wild melon and other weeds were related to planted corn with soybean and compost and the maximum was related to monoculture of corn with weed infestation. Results of analysis of variance indicated treatments had significant effect on grain yield. The lowest yield of corn (2733.3 Kg ha-1) was in weed-infestation control while the highest one (12124.0 and 8351.3 Kg ha-1 respectively) was in weed-free control and soybean’ cover crop plus compost. For both cover crops between fertilizer treatments, compost and chemical fertilizer had more corn biological yield than no fertilizer and differences between this two fertilizer treatments wasn’t significant. Reduction of yield under no fertilizer treatments was due to competition for nutrients, light between weed and corn. The maximum and minimum number of rows in corn and number of kernels per row respectively was obtained with monoculture of corn in weed free and weed infestation, while the maximum weight of 1000 grains was observed in soybean with applying compost. Generally, the living mulch as cover crops can reduce competition between weeds and the main crop.
Conclusion: As cover crops reduce weeds growth, and there was no significant difference between chemical and organic fertilizer in corn yield, so we can use these two options for producing optimum yield in sustainable agriculture. Results showed application of soybean as cover crop, especially integrated with organic fertilizers, can be an alternative approach for herbicides and are more effective than the others.

Keywords

• Chemical fertilizer
• Competition
• Compost
• Cover crops

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References

1- Abaspoor M. and Rezvani Moghaddam P. 2004. The critical period of weed control in corn (Zea mays) at Mashhad, Iran. Iranian Journal of Field Crop Research, 2:182-194. (in Persian with English abstract)

2- Abdin O.A., Zhou X.M., Cloutier D., Coulman D.C., Faris M.A. and Smith D.L. 2000. Cover crops and interrow tillage for weed control in short season maize (Zea mays). European Journal of Agronomy, 12:93-102.

3- Aminghafori A. and Rezvani Moghadam P. 2009. Effect of cover crops on weed control castor (Ricinus communis L.). 1st National Conference oilseed crops. 26 sept 2009. Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran.

4- Aminpanah H., Sorooshzadeh A., Zand E. and Momeni A. 2009. Investigation of light extinction coefficient and canopy structure of more and less competitiveness of rice cultivars (Oryza sativa) against barnyardgrass (Echinochloa crus-galli). Electronic Journal of Crop Production, 2 (3):69-84. (in Persian with English abstract)

5- Ayneband A. 2005. The effect of crop rotation patterns on the dynamics of populations of weeds in maize. Scientific Journal of Agriculture, 28(1):205-207. (in Persian)

6- Baldwin K.R. and Gereamer N. 2006. Organic production. Cover crops for organic farms, 2-10.

7- Carruthers K., Prithiviraj B.F.Q., Cloutier D., Martin R.C. and Smith D.L. 2000. Intercropping corn with soybean, lupin and forages: yield component responses. European Journal of Agronomy, 12:103-115.

8- Clark A. 2007. Managing cover crops profitably. Sustainable Agriculture Network, 3:9-12.

9- Clark A.J., Decker A.M. and Meisinger J.J. 1994. Seeding rate and kill date effects on hairy vetch cereal rye cover crop mixtures for corn production. Agronomy Journal, 86:1065-1070.

10- Compigla E., Mancinlli R., Radicetli E. and Caparali F. 2010. Effect of cover crops and mulches on weed control and nitrogen fertilization. Crops Protection, 29:354-363.

11- Feil B., Garibay S.V., Ammon H.U. and Stamp P. 1997. Maize production in a grass mulch system-seasonal patterns of indicators of the nitrogen status of maize. European Journal of Agronomy, 7:171.

12- Francis C.A., Flor C.A. and Prager M. 1978. Effects of bean association on yields and yield components of maize. Crop Science, 18:760-764.

13- Garibay S.V., Stamp P., Ammon H.U. and Feil B. 1997. Yield and quality components of silage maize in killed and live cover crop sods. European Journal of Agronomy, 6:179-190.

14- Ghafari M., Ahmadvand G., Ardakani M.R., Nadali I. and Elahipanah F. 2011. Effect of cover crops of rye, barley and rapeseed in two planting density on biomass, density and biodiversity of winter weeds. Journal of Crop Ecophysiology, 3(1):1-8. (In Persian with English Abstract)

15- Ghiamati G., Astaraei A. and Zamani G. 2009. Effect of urban solid waste compost and sulfur on sugar beet yield and soil chemical of properties. Journal of Iranian Field Crop Research, 7(1):153-162. (in Persian with English abstract)

16- Gholampor-Marzani F., Saadat M., Ardakani M.R., Kashani A., Pakzad F. and Najafi A. 2009. The effect of plant density and different amounts of micronutrients on biological yield, harvest index and some morphological traits of maize. Journal of Research in Agricultural, 1(2):67-77. (in Persian)

17- Harder H.J., Carlson R.E. and Shaw R.H. 1982. Yield, yield components, and nutrient content of corn grain as influenced by post silking moisture stress. Agronomy Journal, 74:275-278.

18- Hayder G., Mumtaz S.S., Khan A. and Khan S. 2003. Maize and soybean intercropping under various levels of soybean seed rates. Asian Journal of Plant Science, 2:339-341.

19- Hiltbrunner J., Liedgens M., Bloch L., Stamp P. and Streit B. 2007. Legume cover crops as living mulches for winter wheat: Components of biomass and the control of weeds. European Journal of Agronomy, 26:21-29.

20- Hollander N.G., Bastiaans L. and Kropff M.J., 2007. Clover as a cover crop for weed suppression in an intercropping design. I. Characteristics of several clover species. European Journal of Agronomy, 26(2):104-112.

21- Hooks C.R.R. and Johnson M.W. 2001. Broccoli growth parameters and level of head infestations in simple and mixed plantings: Impact of increased flora diversification. Annals of Applied Biology, 138(3):269-280.

22- Hutchinson C.M. and McGiffen M.E. 2000. Cowpea cover crop mulch for weed control in desert pepper production. Horticultural Science, 35:196-198.

23- Indejit and keating K.L. 1999. Allelopathy: principle and practice. John promises for biological control. In: Advance in Agronomy, (eds). Sparks, D. L., Academic press, 67:141-231.

24- Jedrszezylc E. and Malgar Z. 2007. Impact of the living mulch on plant growth and selected features of sweet corn yield. Folia Horticulture, 19(1):3-13.

25- Koocheki A., Lalehgani B. and Najibnia S. 2009. Evaluation of productivity in bean and corn intercropping. Iranian Journal of Field Crop Research, 7(2):605-614. (in Persian with English abstract)

26- Kuo A. and Jellum E.J. 2002. Influence of winter cover crop and residue management on soil nitrogen availability and corn yield. Agronomy Journal, 94:501-508.

27- Mirshekari B. 2010. Yield and harvest index of sunflower in condition of monoculture and competition with Amaranthus hybridus. Journal of Modern Science of Sustainable Agriculture, 6(18):73-88. (in Persian)

28- Mohammadi G.H. 2007. Growth parameters enhancing the competitive ability of corn (Zea mays L.) against weeds. Weed Biology and Management, 7(4): 232-236.

29- Mojab Ghasrodashti1 A., Balouchi H.R. and Yadavi A.R. 2011. Effect of municipal solid waste compost and nitrogen fertilizer on grain yield, forage production and some morphological traits of sweet corn (zea mayz L. sacchrata). Electronic Journal of Crop Production, 4(1):115-130. (in Persian with English abstract)

30- Nazari1 S., Zaefrian F., Farahmandfar E., Zand E. and Bagheri-Shirvan M. 2012. Corn- weed interaction under different sowing dates of cover crops. Iranian Journal of Weed Science, 8(2):63-78. (in Persian with English abstract)

31- Ngouajio M. and Mcgiffen M.E. 2002. Going organic changes weed population dynamic. Horticulture Technology. 12:155-159.

32- Olness A. and Lopez D. 2000. Legume cover crops inter-seeded in corn as a source of nitrogen. In: Green book of Energy and Sustainable Agriculture Program. Minnesota Department of Agriculture, 51-53.

33- Olorunmaiye P.M. 2010. Weed control potential of five legume cover crops in maize/cassava intercrop in a Southern Guinea savanna ecosystem of Nigeria. Australian Journal of Crop Science, 4(5):324-329.

34- Putnam A.R. 1990. Vegetable weed control with minimal herbicide input. Horticultural Science, 25:155-159.

35- Ramroudi M., Hosseini M., Hosseinzadeh H., Mazaheri D. and Hosseini M.B. 2011. Evaluating the effects cover crops, tillage systems and nitrogen rates on soil properties and sorghum forage yields. Agronomy Journal (Pajouhesh and Sazandegi), 92:18-23. (in Persian with English abstract)

36- Reicosky D.C. and Forcella F. 1998. Cover crop and soil quality interactions in agroecosystems. Journal of Soil and Water Conservation, 53(3):224-226.

37- Rezvantalab N., Pirdashti H., Bahmanyar M.A. and Abbasiyan A. 2009. Evaluating effects of municipal waste compost and chemical fertilizer application on yield and yield components of maize (Zea mays L.). Electronic Journal of Crop Production, 2(1):75-90. (in Persian with English abstract)

38- Samadani B., Ranjbar M., Rahimian H. and Jahansoz M.R. 2005. Influence of rye, hairy vetch and mixture of rye and vetch on density and biomass of Sisymbrium officinalis and Fumaria Vaillantii. Iranian Journal of Plant Pathology, 41(1):85-94. (in Persian)

39- Samedani B. and Montazeri M. 2009. The use of cover crop in sustainable agriculture. Iranian Resarch Institute of Plant Protection, Tehran.

40- Sanjani S., Bagher-Hosseini S.M.B., Chaichi M.R. and Rezvan Beidokhti S. 2009. Effect of additive intercropping sorghum: cowpea on weed biomass and density in limited irrigation system. Journal of Iranian Field Crop Research, 7(1):85-95. (in Persian with English abstract)

41- Scott T.W., Pleasant J.M., Burt R.F. and Otis D.J. 1987. Contributions of ground cover, dry-matter, and nitrogen from intercrops and cover crops in a corn polyculture system. Agronomy Journal, 79:792-798.

42- Tollenaar M., Dibo A.A., Aguilara A., Weise S.F. and Swanton C.J. 1994. Effect of crop density on weed interference in maize. Agronomy Journal, 86:591-595.

43- Uchino H., Iwama K., Jitsuyama Y., Yudate T. and Nakamura S. 2009. Yield losses of soybean and maize by competition with interceded cover crop and weed in organic based cropping systems. Field Crops Research, 113:342-357.

44- Van Acker R.C., Weise S.F. and Swanton C.J. 1993. Influence of interference from a mixed weed species stand on soybean (Glycine max (L.) Merr.) growth. Canadian Journal of Plant Science, 73:1293-1304.