Effects of lab and sword bean intercropped to maize grown with spacing suitable for mechanical harvesting on the yields of intercrop maize, weed incidence and soil moisture status
1999
Amnat Suwanarit | Suparb Buranakarn | Jarong Rungchuang | Somporn Thongdang (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Department of Soil Science)
As an effort to find appropriate technique for green-manure production for maize farmers in Thailand, a field experiment was conducted on Pakchong soil series (Reddish Brown Lateritic Group or Oxic Paleustult) at the National Corn and Sorghum Research Center to examine the effects of intercropping lab lab and sword bean on maize grown with different spacing that were suitable for mechanical harvesting. From results the present experiment, conclusions were drawn as follows: 1) The two legumes and the two types of maize spacing used for the intercrop systems were comparable in producing maize grain yield. Grain yields of maize in the intercrop systems were in the range of 54-75 percent of that of the sole maize system. 2) Intercropping the legumes to maize reduced weed incidence. 3) Intercropping the legumes to maize reduced loss of water through evapo-transpiration resulting higher soil moisture status than the sole maize. 4) Legumes intercropped in the single row maize, with wider row spacing but narrower hill spacing than those of the double row maize, gave higher dry weight than those intercropped in the double row maize. The effects of maize spacing on the dry weight of intercrop legumes were larger in the case of sward bean than in the case of lab lab.
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