Partitioning of competitive effects when intercropping maize with soybean [electronic resource].

Includes references.

A method outlined by Mather and Cdligari (1981) was employed to estimate and separate out overall competition effects to its component parts of intra-and intercompetition for plant height, productive organs (ears and pods), (grain and seed number), seed index and yield (grain or seed) in intercropped Maize (m) and soybean (s) using intercropping replacement series 50°./0, 75% and 25% for maize. The corresponding proportion for 'soybean were 50%, 75% and 25% . This research work was carried out At Gemmeiza experimental research station. The obtained results indicated that competition was mainly due to intercompetition in all studied characters in maize, plant height, ears/plant and seed index (season 2001) as well as number of grains / row and grain yield (summer seasons of 2000 and 2001). In soybean interacompetition was found to be the major component for plant height (season 2001), number of seeds/pod and seed yield kglfad (summer seasons, 2000 and 2001), explaining competitive ability of these characters. Employing competitive parameters, results showed that pressure (a) and response (r) parameters had different signs for plant height and number of productive organs (ears/plant and pods / plant) in summer seasons of 2000 and 2001 as well as number of seeds or grains in the 2nd seasons 2001, explainiDg the importance of intercompetition. Whereas, (a) and (r) gave the same sign for seed iDdex and yield in the summer season of 2000 and 2001 as weD as (number of grains or seeds) 1st season, emphasizing that iDracompeti.tion made up the most part of under limiting

Summary in Arabic.

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