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Deferred Seeding of Blackgram ( Phaseolus mungo L.) in Rice ( Oryza sativa L.) Field on Yield Advantages and Smothering of Weeds

2005; Wiley; Volume: 191; Issue: 3 Linguagem: Inglês

10.1111/j.1439-037x.2005.00157.x

1439-037X

Ashim Midya, K. Bhattacharjee, S. S. Ghose, P. Banik,

Weed Control and Herbicide Applications

Abstract Field experiments were conducted at Agricultural Experimental Farm, Giridih, Jharkhand, during the kharif (wet) seasons of consecutive four years (1998–2001) to study the effect of staggered seeding of blackgram ( Phaseolus mungo L.) in rice field as a cereal–legume intercropping system and to minimize the degree of competition between the crop species to avoid yield damage, and at the same time to create a high level of competition by the intercrops to suppress the weeds. Intercropping systems were assessed on the basis of land equivalent ratio, relative crowding coefficient, aggressivity, actual yield loss, monetary advantage, etc. Intercropping reduced the yield of component crops when compared with respective pure stands. However, deferred seeding of blackgram in rice (30 cm) after one weeding was most remunerative system and registered maximum rice‐equivalent yield (2711 kg ha −1 ). Rice–blackgram (20 cm) intercropping system was very effective for weed smothering among unweeded intercropping treatments. In conclusion, deferred seeding of blackgram in rice field (30 cm) with one weeding may be recommended for better yield, weed suppression and better economics in the eastern plateau region of India.