Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
A field experiment was conducted during the rainy (kharif) season in 2019, 2020 and 2021
under rainfed conditions in a randomised block design with 4 replications. There were 6
treatments with different strip widths of maize and blackgram, which included maize strip 3
m wide and black gram 2.4 m(T1), maizestrip6 m wide and black gram 2.4 m (T2),
maizestrip3 m wide and black gram 4.8 m (T3) , maize strip 6 m wide and black gram 4.8 m
(T 4), sole maize (T 5) and sole black gram (T 6).The maize variety PMH-1 was sown at a
spacing of 60 cm x 20 cm and blackgram variety mash-114 was sown at 30 cm x 10 cm
spacing respectively using 20 kg seed per hectare for each crop. The crops were harvested
from the last week of September to the first week of October during three years of
experimentation.
Results
Strip-intercropping of maize and black gram resulted in higher yield than sole crops of maize
and black gram. The highest maize equivalent yield (MEY) was recorded in maize strip 6 m
wide and black gram 2.4 m (3439 kgha -1 ) which was significantly higher overthe sole crop of
maize by 11.3% and black gram by 14.8% but at par with maize and black gram stripintercropping
systems. The highest LER (1.14), rain water use efficiency (4.98kg ha -1 mm -1 )
and net returns (Rs 40393 ha -1 ) was recorded with maize and black gram strip-intercropping
in 6 m and 2.4 m, respectively. However, the BC ratio (2.32) was highest in maize strip 3 m
and black gram strip width 4.8 m followed by 6 m and 2.4 m strip width (2.27).
Effect of strip intercropping of maize and blackgram on maize equivalent yield (MEY),
land equivalent ratios (LER), economics and rain water use efficiency (RWUE) (mean
Treatments
Maize 3 m strip and
blackgram 2.4 m strip
Maize 6 m strip and
blackgram 2.4 m strip
Maize 3 m strip and
blackgram 4.8 m strip
Maize 6 m strip and
blackgram 4.8 m strip
data of 3 year)
Yield (kg ha -1 )
Net
RWUE
B:C
MEY LER returns
Maize Blackgram (Rs ha -1 ratio
) (kg ha -1 mm -1 )
2119 403 3346 1.11 37891 2.25 4.70
2589 279 3439 1.14 40393 2.27 4.98
1420 591 3213 1.08 35991 2.32 4.27
1997 425 3288 1.10 37221 2.25 4.57
Sole maize at 60 cm x 20 cm 3052 - 3052 - 31348 1.84 4.69
Sole blackgram at 30 cm x
10 cm
- 972 2931 - 32226 2.18 4.35
CD (0.05) 125 60.0 263 0.10 5237 0.19 0.345
Rainfall (mm) 659
174 | Page
Ecosystem based approaches for climate change adaptation, ecosystem services, integrated farming system models,
Land degradation neutrality