INFLUENCE OF DIRECT APPLICATION OF ROCK PHOSPHATE ON GROWTH, YIELD AND NUTRIENT UPTAKE OF RICE (BRRI DHAN 39) IN AN ACID SOIL

Abstract

A Thesis Submitted to the Department of Soil Science Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (M.S.) IN SOIL SCIENCE Semester : July – December,2005 Approved by: (Name) (Signature) Supervisor: Dr. Gopi Nath Chandra Sutradhar …………………………………… Co-supervisor : Md. Mukhlesure Rahman …………………………………… Chairman of the Department: Dr. Gopi Nath Chandra Sutradhar …………………………………. CERTIFICATE This is to certify that thesis entitled, “INFLUENCE OF DIRECT APPLICATION OF ROCK PHOSPHATE ON GROWTH, YIELD AND NUTRIENT UPTAKE OF RICE(BRRI DHAN 39) IN AN ACID SOIL” Submitted to the Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (M.S.) in SOIL SCIENCE embodies the result of a piece of bona fide research work carried out by MOHAMMAD ISSAK Registration No. 01503 under my supervision and guidance. No part of the thesis has been submitted for any other degree or diploma. I further certify that such help or source of information, as has been availed of during the course of this investigation has duly been acknowledged by him. Dated: ………………………….. Place: Dhaka, Bangladesh Supervisor Dr. Gopi Nath Chandra Sutradhare ACKNOWLEDGEMENT Alhamdulillah. Allah, the merciful, who has created everything in this universe and kindly enabled me to present this thesis for the degree of Master of Science (M.S.) in Soil Science. I express my sincere gratitude, hearty respect, immense indebtedness and profound appreciation to my research supervisor Associate Professor Dr. Gopi Nath Chandra Sutradhar, Chairman, Department of Soil Science, Shere-e-Bangla Agricultural university (SAU), Dhaka for his scholastic guidance and immense help in preparing the thesis. I express my deepest sense of respect, gratitude and profound indebtedness to my reverend co-supervisor Md. Mukhlesure Rahman, Chief Scientific Officer (CSO), Soil Science Division, Bangladesh Agricultural Research Institute (BARI), Joydevpur, Gazipur for his constant cooperation, constructive criticism and technical help. I feel to express my sincere appreciation and indeptedness to my esteemed teachers Professor Dr. Md. Nurul Islam, Associate Professor Dr. Alok Kumer Paul, Assistant Professors A. T. M. Shamsuddoha, Md. Asaduzzaman Khan and Mst. Afrose Jahan and Lecturer Md. Mosharraf Hossain, Dept. of Soil Science, Sher-e-Bangla Agricultural University, Dhaka for their valuable teaching, direct and indirect advice, encouragement and cooperation during the whole study period. I owe special gratitude and feel highly esteemed to place sincere thanks to the Vice –Chancellor Prof. Dr. A. M. Farooque, Registrar Mr. Abu Akbar Mia and Post Graduate Dean Prof. Md. Shadat Ulla for helping me in several ways. I do also wish to express my cordial thanks to Dr. Syed Anwarul Haque for the supply of Rock Phosphate fertilizer and other technical help. I owe a lot to Dr. Parimal Kanti Biswas, Dr. A. K. M. Ruhul Amin, Dr. M. A. Hashem and Dr. Md. Rafiqul Islam for their help just when I needed. I expresses my unfathomable tributes, sincere gratitude and heartfelt indebtedness from my core of heart to my mother Mrs. Zohura Begum, father Md. Abul Hashem, and also pleasant to my brother Md. Nural Islam and sisters, Poly, Joly and Doly whose blessing, inspiration, sacrifice, and moral support opened the gate and paved to way of my higher study. I feel much pleasure to convey the profound thanks to my friends, well wishers for their active encouragement and inspiration; personal acknowledgement are made to Tuhin, Zakir, Titu, Saiful, Prince, Rasomoi, Samima, Firdousi, Rouf, Ratan,Khairul, Sanjoy, Sanjit, Prodip, sraban and Khokon. Mohammad Issak Place: Dhaka Dated: th December,2005 ABSTRACT A field experiment was carried out in Modhupur Tract (AEZ 28) at Agronomy Field Laboratory in Sher-e-Bangla Agricultural University, Dhaka to study the influence of direct application of rock phosphate (PR) in comparison to TSP as a source of P on growth, yield and nutrient uptake of BRRI Dhan 39 during the T. aman season, 2004. The experiment was laid out in a Randomized Complete Block Design (RCBD) with four replications of each treatment. The treatments used were T1: control (0 kg P ha-1), T2: PR (35 kg P ha-1), T3: TSP (35 kg P ha-1) and T4: PR (210 kg P ha-1), T5: TSP (17.5 kg P ha-1) + (PR 17.5 kg P ha-1). Basal application was made with N, K, S and Zn. The results indicated that there was no statistical difference in dry matter yield at maximum tillering stage, but the dry matter production at panicle initiation stage was found statistically significant. Among the yield and yield contributing characters effective tillers hill-1, filled grains panicle-1, unfilled grain panicle-1, grain yield and straw yield were significantly varied with P treatments. The highest grain yield was recorded in T5 treatment and the lowest yield in control treatment. The yields due to different treatments ranked in the order of T5>T4> T3> T2> T1. The N, P, K and S contents as well as uptake by rice plant were also increased due to application of different treatments. The maximum N, P, K and S content as well as uptake in rice plant, grain and straw were recorded in T5 treatment. The economic analysis demonstrated that the highest net benefit of Tk. 25165 ha-1 was obtained in T5 treatment. The N, P, K and S nutrient contents and uptake significantly increased due to mixed (1:1 ratio of T2 and T3 treatments) application of rock phosphate (PR) and Triple Super Phosphate (TSP) in T5 treatment compared to other treatments. The judicious mixed application of PR and TSP was more effective and beneficial due to its appropriate availability for plants over longer period of time (initially from TSP and later from PR) and at comparatively low cost.