GUPTA, Y CSHARMA, PRIYANKA2018-12-212018-12-212018-10http://krishikosh.egranth.ac.in/handle/1/5810086218ABSTRACT The present investigation entitled, “Studies on the effect of plant spacing and shoot thinning on Godetia grandiflora (Lindl.)” was carried out at the Research Farm of the Department of Floriculture and Landscape Architecture, Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan (HP) from October 2017 to June 2018. Objective of the research was to find out the effects of plant spacing and shoot thinning for cut flower production of Godetia. The experiment was laid out in randomized block design (Factorial) with four treatment combinations replicated thrice.The observations on various growth ands flowering parameterwere recorded. Results revealed that Among three different spacing viz., 30×20 cm, 30×25 cm and 30×30 cm, plant spacing (30×25 cm) gave best result for parameters like plant height (79.89 cm), stem length of secondary branches (56.38 cm), number of cut stem per plant(9.95) and vase life (10.43 days) whereas maximum plant spread (50.71 cm), number of flowers per stem (8.17), size of flower (4.17) was recorded with spacing of 30×30 cm and yield of cut stems per plot (248.73) was recorded with spacing of 30×20 cm. Among four different shoot thinning viz., T1(no shoot thinning), T2 (4 healthy shoots retained and others thinned out), T3 (5 healthy shoots retained and others thinned out) and T4(6 healthy shoots retained and others thinned out), shoot thinning T2 with 4 healthy shoots retained and others thinned out gave best result for parameter like plant height (77.22 cm), plant spread (52.32 cm), stem length of secondary branches (54.27 cm), whereas maximum number of flowers per stem (8.11), number of cut stem per plant(11.27), size of flower (3.99 cm),vase life (9.15 days) and yield of cut stems per plot (248.73) was recorded with 5 healthy shoots retained and others thinned out. The maximum yield of cut stem per plot was found in spacing 30 × 20 cm which was found to be at par with 30 × 25 cm and shoot thinning (T3) with 5 healthy shoots retained gave more production per unit area.ennullThesis