Influence of composted tobacco waste and farmyard manure applications on the yield and nutrient composition of lettuce (Lactuca sativa L. var. capitata)

摘要

The use of organic wastes in agriculture, forestry and land reclamation has been increasingly identified as an important issue for soil fertility, soil conservation and residue disposal. Using organic wastes in agriculture helps not only to dispose these materials economically, but also reduces negative effects on the environment. In the present study, composted tobacco waste (CTW) combined with farmyard manure (FM) at different ratios was applied to Typic Xerofluvent soil, and the influence of these amendments on the yield and nutrient composition of butter head letttuce (Lactuca sativa L. var. capitata) were investigated. The experiment was conducted in 18 parcels in a randomized-block design with three replications at the Agriculture Faculty’s Research Farm of Ege University in Menemen plain, in the Western Anatolia Region of Turkey (38°58′35.51″-38°58′36.03″N; 27°03′84.56″-27°03′89.81″E). Organic materials were applied to the soil after composting. The treatments were (1) control, (2) 12.5 t ha-1 FM + 37.5 t ha-1 CTW, (3) 25 t ha-1 FM + 25 t ha-1 CTW, (4) 50 t ha-1 FM, (5) 50 t ha-1 CTW, and (6) 37.5 t ha-1 FM + 12.5 t ha-1 CTW. The maximum yield was obtained during the 1st vegetation period (62,7 t ha-1) in the 100 % CTW application. On account of the 2nd vegetation period’s coinciding with winter and the coldness of the months December, January and February, there happened a slowdown in the lettuce yield. The highest total yield of lettuce in both vegetation periods (102.7 t ha-1) was determined in 100% CTW application parcels. The lower lettuce yields were determined in the control parcels. CTW and FM applications raised N, P, K Ca, Mg, Na, Fe, Zn and Mn contents of the lettuce. According to the results obtained, it can be said that CTW can be used in agricultural fields just like FM.