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Effect of Mixed Row Cropping of Early and Late Maturing Rice Varieties on Crop Productivity under Intermediate Deepwater Conditions

Published online by Cambridge University Press:  03 October 2008

M. D. Reddy ,
A. R. Sharma  and
M. M. Panda
M. D. Reddy
Affiliation:
Agronomy Division, Central Rice Research Institute, Cuttack 753006, India
A. R. Sharma
Affiliation:
Agronomy Division, Central Rice Research Institute, Cuttack 753006, India
M. M. Panda
Affiliation:
Agronomy Division, Central Rice Research Institute, Cuttack 753006, India
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Summary

Two early maturing semi-tall (120–130 cm) rice varieties, Kalinga-3 (85 days duration) and Banaprabha (95 days duration), were compared in pure and mixed crop stands under intermediate deepwater conditions (15–50 cm) with a modern late maturing (170 days duration) semi-dwarf (100 cm) variety, CR 1016. Parallel line seeding of CR 1016 and Kalinga-3 or Banaprabha in alternate rows (1:1 ratio) 20 cm apart yielded 19% more grain than a pure crop of CR 1016 alone. Mixed crop planting in a 1:2 or 2:1 ratio or with reduced inter-rovv spacing gave no additional yield advantage. Mixed row cropping prevented lodging in early varieties, whereas monocrops of the same varieties were partially lodged and showed some premature seed germination. The better and more stable yields obtained from such mixed cropping could be beneficial to resource poor farmers growing rice in conditions of excess water.

Type
Research Article
Information
Experimental Agriculture , Volume 27 , Issue 1 , January 1991 , pp. 79 - 85
Copyright
Copyright © Cambridge University Press 1991

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References

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