تأثیر کشت مخلوط افزایشی بر عملکرد و اجزای عملکرد ذرت شیرین (Zea mays L. var. Saccharata) و ماش Vigna radiate L.)) و وزن علف‌های هرز

نوع مقاله : علمی - پژوهشی

نویسندگان

دانشگاه یاسوج

چکیده

به‌منظور بررسی تاثیر کشت مخلوط افزایشی بر عملکرد و اجزای عملکرد ذرت شیرین (Zea mays L. var. Saccharata) و ماش (Vigna radiate L.) در شرایط کنترل و عدم کنترل علف‌های هرز، آزمایشی در مزرعه‌ای واقع در شهرستان چرام استان کهگیلویه و بویراحمد در سال زراعی 94-1393 اجرا شد. آزمایش به‌صورت فاکتوریل دو فاکتوره در قالب طرح بلوک‌های کامل تصادفی با سه تکرار اجرا شد. فاکتور اول شامل سیستم‌های کشت با نسبت‌های مختلف کشت مخلوط افزایشی ذرت شیرین و ماش (افزایش 20، 40، 60 و 80 درصد تراکم بهینه ماش، به تراکم بهینه ذرت) و همچنین کشت خالص هر دو گونه بود. فاکتور دوم نیز شامل دو سطح کنترل و عدم کنترل علف‌های هرز بود. در این آزمایش عملکرد و اجزای عملکرد هر دو گیاه و وزن خشک علف‌های هرز اندازه‌گیری شد و در نهایت با استفاده از شاخص‌ نسبت برابری زمین، سودمندی کشت مخلوط نسبت به تک-کشتی مورد ارزیابی قرار گرفت. نتایج نشان داد بیشترین عملکرد دانه‌ کنسروی ذرت شیرین (7/7983 کیلوگرم در هکتار) از کشت مخلوط ذرت+40 درصد تراکم ماش حاصل گردید. در تمامی نسبت‌های مخلوط وزن خشک علف‌های هرز کمتر از کشت خالص دو گونه ذرت شیرین و ماش بود. تمامی تیمارهای مخلوط افزایشی دارای نسبت برابری بالای یک داشتند و بیشترین سودمندی بر اساس این شاخص مربوط به تیمار مخلوط ذرت با 80 درصد ماش بود که البته تفاوت معنی‌داری با تیمارهای ذرت به‌همراه 40 و 60 درصد ماش نداشت.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Additive Intercropping on Yield and Yield Components of Sweet Corn (Zea mays L.var. Saccharata) and Mungbean (Vigna radiate L.) and Weed Biomass

نویسندگان [English]

  • Amaneh Gholinejad
  • Alireza Yadavi
  • Mohsen Movahhedi Dehnavi
  • Hooshang Farajee
Yasouj university
چکیده [English]

Introduction:
Weeds are one of the most important factors in reducing crop yield. Excessive use of herbicides for weed control because of the environmental pollution and ecological damaging effects does not have the necessary sustainability. One of the strategies to reduce the herbicides use in agriculture is use of intercropping systems with cover crops. Additive intercropping of different crop together through create an intense competition micro-ecosystem, provided the conditions that weeds damage would be minimized in these situations. This study was conducted to evaluate the quantitative usefulness of sweet corn-mungbean intercropping and its effect on weed control.
Materials and Methods:
The experiment was conducted as factorial base on randomized complete block design with three replications. The first factor consisted of 6 levels of different cultivation systems (sweet corn and mungbean monoculture, intercropping of 20, 40, 60 and 80 percent of net density mungbeans with sweet corn) and the second factor was two levels of control and lack of weed control. Each plot had a length of 6 meters, including 4 rows by 60 cm distance. In monocultures, sweet corn (8.3 plant m-2 density) with 20 cm plant spacing and mungbean (8.23 plantm-2 density) with 7 cm plant spacing were planted. In intercropping treatments also sweet corn and mungbean were planted on both sides of the heap that plant spacing for sweet corn was 20 cm and for mungbean base on additive intercropping treatment were 8.7, 11.6, 17.5 and 35.8 cm respectively for creation of 80, 60, 40 and 20 percent of mungbean optimal density.
Results and Discussion:
Weed competition reduced 1000 seed weight, seed number per row and canned grain yield of sweet corn by 13.8, 24 and 42.6 percent respectively. The highest (301.7 g) and lowest (281.8 g) of 1000 seed weight of sweet corn were related to intercropping of 20 and 80% optimal mungbean density with sweet corn, respectively. The highest (24.3) and lowest (20.6) of seed number per row of sweet corn were obtained respectively in intercropping of 40 and 80% optimal mungbean density with sweet corn. Compared to monoculture treatment the only intercropping treatments of 40 and 60% mungbean + sweet corn increased the canned grain yield of sweet corn significantly.
Weeds competition and cultivation system had significant effect on 1000 seed weight, pod number per plant, seed number per pod, grain yield, biological yield and harvest index of mungbean. Treatments of 60% mungbean + sweet corn intercropping and mungbean monoculture had the highest (40.8 g) and lowest (37.7 g) 1000 seed weight of mungbean respectively. Intercropping of sweet corn + 20, 40 and 60% mungbean treatments increased number of pods per mungbean plant compared to pure culture significantly. In all of the intercropping treatments relative to mungbean monoculture the seed number per pod was increased. In the absence of weeds, intercropping of sweet corn + 80% mungbean and in the presence of weeds, intercropping of sweet corn + 60% and 80% mungbean had the similar mungbean grain yield (no significant difference) with the mungbean monoculture. Weed competition decreased the 1000 seed weight, pods number per plant and seed number per pod of mungbean about 13, 27 and 15 percent respectively. The highest weed dry weight (802.4 gr m-2) was observed in the pure culture of mungbean without non-significant differences with the sweet corn monoculture.
The lowest weed dry weight (465.9 gr m-2) was observed in the intercropping treatment of sweet corn + 40% mungbean without non-significant differences with other intercropping treatments.
In all of the intercropping treatments the land equivalent ratio was greater than one (LER≥1) and ranged from 1.41to 1.89.
Conclusions:
Based on the results of this experiment, additive intercropping sweet corn and mungbean in all of additive mungbean levels had the higher usefulness than monoculture of these species and in all of the intercropping treatments land equivalent ratio was more than one (LER≥1). The best additive intercropping treatment was sweet corn + 40% mungbean.

کلیدواژه‌ها [English]

  • Canned grain yield
  • Competition
  • Harvest index
  • LER
  • Weed
Abadian, H., Yarnia, M., Pirdashti, H., Abasi, R., and Farahvash, F. 2014. Evaluation of basil (Ocimum basilicum) and cowpea (Vigna unguiculata) intercropping at different nitrogen fertilizer levels and its effect on weed density. Iranian Journal of weed science 9: 187-199. (In Persian with English Summary)
Abdin, O.M., Coulman, B.E., Cloutier, D., Faris, M.A., Zhou, X., and Smith, D.L. 2000. Yield and yield components of corn inter seeded with cover crops. Agronomy Journal 90: 63-68.
Baumann, D.T., Bastians, L., Gaudian, I., Vanlar, H.H., and. Kroff, M.J. 2002. Analysing crop yield and plant quality in an intercropping system using an eco-physiological model for interplantcompetition. Agricultural Systems 13: 173-203.
Bigonah, R., Rezvani Moghaddam, P., and Jahan, M. 2014. Effects of intercropping on biological yield, percentage of nitrogen and morphological characteristics of coriander and fenugreek. Iranian Journal of Field Crops Research 12(3): 369-377. (In Persian with English Summary)
Delafuente, E.B., Suarez, S.A., and Ghersa, C.M. 2006. Soybean weeds community composition and between 1995 and 2003 in the rolling pampas (Argentina). Agriculture, Ecosystems and Environment 115: 229-236.
Hamzei, J., and Ghamari Rahim, N. 2014a. Evaluation of the effect of additive intercropping of Phaseolus vulgaris in weed control at the maize field and its effects on yield and land use efficiency. Journal of Crop Production and Processing 3(10): 89-99. (In Persian with English Summary)
Hamzei, J., and Ghamari Rahim, N. 2014 b. Evaluation of corn-soybean intercropping advantages using agronomic and weed control efficiency indices. Journal of Sustainable Agriculture and Production Science 24(3): 61-74. (In Persian with English Summary)
Hosseini, M.B., Mazaheri, D., Jahansouz, M.R., and Yazdi Samadi, B. 2004. The effects of nitrogen levels on yield and yield components of forage millet (Pennisetum americanum) and cowpea (Vigna unguiculata) in intercropping system. Pajouhesh and Sazandegi 59: 60-67. (In Persian with English Summary)
Jamshidi, K., Mazaheri, D., Majnoun Hosseini, N., Rahimian Mashhadi, H., and Peyghambari, S.A. 2011. Investigation of corn/cowpea intercropping effect on suppressing the weeds. Iranian Journal of Field Crops Research 42(2): 233-241. (In Persian with English Summary)
Koocheki, A., Nassiri Mahallati, M., Feizi, H., Amirmoradi, S., Mondani, F. 2010. Effect of strip intercropping of maize (Zea mays L.) and bean (Phaseolus vulgaris L.) on yield and land equivalent ratio in weedy and weed free conditions. Journal of Agroecology 2(2)225-235. (In Persian with English Summary)
Liebman, M., and Davis, A.S. 2000. Integration of soil, crop and weed management in low external-input farming systems. Weed Research 40: 27-47.
Mansouri, L., Jamshidi, K., Rastgoo, M., Saba, J., and Mansouri, J. 2013. The effect of additive maize-bean intercropping on yield, yield components and weeds control in Zanjan climate conditions. Iranian Journal of Field Crops Research 11(3): 483-492. (In Persian with English Summary)
Mazaheri, D., Movahhedi Dehnavi, M., Bankesaz, A., Hosein Zadeh, A., and Ghanadha, M.R. 2001. Effect of corn and bean intercropping on weed control. Pajouhesh and Sazandegi 47(2): 45-51. (In Persian with English Summary)
Nasrollahzadeh Asl, A., Chavoshgoli, A., Valizadegan, E., Valiloo, R., and Nasrollahzadeh Asl, V. 2012. Evaluation of sunflower (Heliantus annus L.) and pinto bean (Phaseolus vulgaris L.) intercropping based on additive method. Journal of Sustainable Agriculture and Production Science 22(2): 79-90. (In Persian with English Summary)
Nazari, S., Zand, E., Asadi, S., and Golzardi, F. 2013. Effect of additive and replacement intercropping series of corn (Zea mays L.) and mungbean (Vigna radiate L.) on yield, yield components and weed biomass. Weed Research Journal 4(2): 97-109. (In Persian with English Summary)
Sanjani, S., Hosseini, M.B., Chaichi, M.R., and Rezvan Beidokhti, S. 2010. Effect of additive intercropping sorghum/cowpea on weed biomass and density in limited irrigation system. Iranian Journal of Field Crops Research 7(1): 85-95. (In Persian with English Summary)
Silva, P.S.L., Oliveira, O.F, Silva, P.I.B., Silva, K.M.B., and Braga, J.D. 2009. Effect of cowpea intercropping on weed control and corn yield. Planta Daninha 27: 491-497.
Uchino, H., Iwama, K., Jitsuyama, Y., Yudate, T., and Nakamura, S. 2009. Yield losses of soybean and maize by competition with inter seeded cover crops and weeds in organic-based cropping systems. Field Crops Research 113: 342–351.