Intercropping of sunflower with mungbean and corn
2003
Srisa-ad, K.(Mahasarakham University, Maha Sarakham (Thailand). Faculty of Technology) | Laosuwan, P.(Suranaree University of Technology, Nakhon Ratchasima (Thailand). Institute of Agricultural Technology)
In Thailand, sunflower is grown after other crops such as corn. The yield of the crop is low as it is being grown at the end of rainy season. Therefore, if sunflower is intercropped with other full season crops, the yield potential of sunflower may be improved. This experiment was aimed to study the effect of sunflower-mungbean intercropping by using different rates of nitrogen application and crop proportion. The results showed that the LER (Land Equivalent Ratio) of the control plot (0 N) was 1.18 and higher than of fertilized plots, 6, 12 N, of 0.98 and 1.03, respectively. Sunflower intercropped with mungbean gave LER of 1.11 which was higher than that with corn (LER 1.01). The average proportions of intercropping were not different in LER. However, the LER of sunflower intercropped with mungbean in different proportions was significantly different. For this system, the proportion of 50 percent sunflower and 50 percent mungbean gave the LER of 1.24. At the same proportion, the highest LER of 1.41 was obtained from the control plot without nitrogen application. In term of income, the proportion of sunflower and intercrops of 75 to 25 percent tended to give the highest income. It was found also that sunflower and mungbean intercropping increased the seed protein content and decreased the severity of Cercospora leafspot and powdery mildew of respective crops.
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