Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Studies on the effect of intercropping of Sorghum with grain Legumes under semi arid conditions

Auteur : Reddi, K C

Etablissement de soutenance : Andhra Pradesh Agricultural University

Grade : Masters thesis 1977

Résumé An experiment entitled "Studies on the effect of intercropping of Sorghum with grain legurnes under semi-arid conditions" was conducted during the period .from July 1976 to January 1977 at two sites namely Farm. College of Agriculture, Rajendranagar, and International Crops Research Institute for Semi-Arid Tropics, Hyderabad. The experiment involved three levels of nitro Ren (0. 40 and 80 kg. N/ha) as main-plot treatments, three spacings (45 cm x 15 cm. 67.5 cm x 10 cm and 90 cm x 7.5 cm) and three cropping, systems (sorghum sole. sorghum/ounp,bean and sorghunm/pigeonpea) as a sub-plot treatments. The experiment was laid out in split plot design with three replications. The data on various growth characters viz plant height, number of leaves, leaf area index and dry matter production, and yield attributes namely earhead length. earhead girth, test weight, per plant yield were recorded periodically for the rain crop of sorr.hu . Nitrogen content of the plants at different growth stages and protein content in grain were estimated for the. main and intercrops. Phosphorus was estimated in the rain crop periodically and K was estimated only in harvest. Data on straw and grain yields were recorded to determine cross rnonetary returns and harvest indices.
Results of the experiment are summarized below. 1) The levels of nitrogen 40 and 80 kg N/ha influenced all the. growth characters of sorghum except number of green leaves per plant. the yield components and yield significantly. Protein yield, nitrogen uptake and monetary returns were also influenced favorably by these levels of nitrogen. 2) Spacing treatments did not influence the rain crop of sorghum and the intercrop pigeonpea. Increase in inter-row spacing of sorghum resulted in increase in rain yield in mung.bean. 3) Mungbean intercropping , with sorghum resulted in decreasing the yield of rain crop to different degrees. However, gross monetary returns were in favor of intercropping 4) Pirgeonpea intercropping with sorghum also reduced the yield of sorghum crop. However, by virtue of higher grain yield and monetary returns to pigeonpea the gross returns from sorghum/pireonpea intercropping system were superior to the other two systems.

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