Yield performance and complementarity of rice (Oryza sativa) with greengram (Phaseolus radiatus), blackgram (Phaseolus mungo) and pigeonpea (Cajanus cajan) under different rice-legume associations
Bk. Mandal et al., Yield performance and complementarity of rice (Oryza sativa) with greengram (Phaseolus radiatus), blackgram (Phaseolus mungo) and pigeonpea (Cajanus cajan) under different rice-legume associations, I J AGRON, 45(1), 2000, pp. 41-47
In a field investigation during the wet season of 1991 and 1992, the perfor
mance of rice (Oryza sativa L.) with associated legumes, viz. greengram (Ph
aseolus radiatus (L.) Millsp.], blackgram (Phaseolus mango L.) and pigeonpe
a (Cajanus cajan L.) was studied under different inter- and mixed cropping
systems. In rice, the number of effective tlllers/m(2), number of filled gr
ains/panicle, 1,000-grain weight and grain yield increased when intercroppe
d with greengram and blackgram and decreased when mixed cropping of rice pigeonpea was practiced. In associated greengram, blackgram and pigeonpea,
the total number of branches/plant, number of filled pods/plant, number of
seeds/ pod, 1,000-seed weight and seed yield increased in different intercr
opping systems. The highest net returns and net return/rupee of investment
were obtained from sole crop of pigeonpea. The relative crowding coefficien
t (RCC) and competitive ratio (CR) values were always greater than unity wi
th all the intercropping systems. The land-equivalent ratio (LER) and monet
ary advantage IMA) were the highest with rice+greengram intercropping syste
m at a higher level of fertility, whereas rice+pigeonpea intercropping syst
em at a higher level of fertility showed the highest values of area-time eq
uivalent ratio (ATER).