Effect of intercropping systems on land equivalent ratio, aggressivity and correlation coefficients of roselle and guar [electronic resource].

Includes references.

The present work was conducted at Inshas El-Raml District, Sharkia during 1997 and 1998 seasons aiming to study the effect of intercropping systems on cumpetitive relationships; land equivalent ratio (LER) and aggressivity (A) in cropped roselle and guar as well as correlation coefficients between the characters uf either roselle or guar under the effect of intercropping systems conditions at Sharkia Governorate . The intercropping systems used were (1:1), (1:2), (1:3), (2:1) and (3:1) of rosella and guar, respectively. Solid planting of both rosella and guar was used as control. Intercropping of one row of rosella with three rows of guar (1:3) gave higher values of land equivalent ratio' (LER) (1,48 and 1.17 in the first and second season, respectively) compared to' the other intercropping systems. On the contrary, the least value of (LER,) was obtained from two rows of roselle cropped with one row of guar (2:1) when cum pared with the other systems .Furthermore, rosella was the dominant component in both 2:1 and 3:1 cropping systems, whereas it was the dominated in 1:1 and 1:2 systems. In addition, under intercropping systems conditions, anthocyanin production in roselle sepals showed positive and insignificant correlations with each uf sepals weight / plant, sepals number / plant, dry weight of leaves / plant, total nitrogen and phosphorus as well as potassium contents. Also', there was positive and significant relation with total carbohydrate content in this respect. Meanwhile; under intercropping systems conditions, guaran percentage in guar seeds showed negative and insignificant pertinences with each of seed weight per plant, seed number per plant, total carbohydrate, nitrogen, phosphorus and potassium percentages. On the other hand, there was positive and insignificant relation with dry weight of leaves per plant in this concern. Likewise, correlation coefficients between the other characteti of either roselle or guar were studied in this connection. Generally, using of intercropping system of one row of roselle and three rows of guar (1:3) maximized the productivity of yield / fad. of roseiie sepals and guar seeds compared to those of solid planting system of both roselle and guar, so this treatment could be recommended.

Summary in Arabic.

1