Effects of Plant Density on the Economic Yield and Agronomic Characters of Perilla frutescens L
Peril a frutescens L. is a traditional medicinal plant in china. ln recent years, with more and more attention is paid to the nutritional and health values of Peril a frutescens L., it has become a potential medicinal and edible crop. Two Per-il a frutescens cultivars, Qisu No.1 (oil type) and Qisu No.3 (leaf and seed-using type), bred by Rapeseed Research lnstitute of Guizhou Academy of Agricultural Sciences, were used as test material for studying the effects of different planting density on the economic yield and agronomic characters of Peril a frutescens L. under moderate fertility level. The results showed the variation tendency of agro-nomic characters with the change of planting density was similar for the two Peril a frutescens cultivars. Among them, the plant height, main-stem nods, first effective branch length, first effective branch height, spikes per plant, and yield per plant were negatively related to the planting density; and main spike length and main-spike grains were positively related to the planting density. The effects of planting density on kilo-grain weight were not significant. The yield of the two cultivars al increased first and then decreased with the increase of planting density. The re-gression analysis of planting density versus yield of Peril a frutescens L. was per-formed for obtaining the regression equations (Qisu No.1: y=54.046 5+96.777 1x-45.719 8x2, r=0.999 4; Qisu No.3: y=38.717 6+42.111 3x-16.757 7x2, r=0.999 8). Based on the regression equations, the optimal planting density for Qisu No.1 was 158 745 plants/hm2 with peak yield of 1 578.90 kg/hm2, and for Qisu No.3 was 188 745 plants/hm2 with peak yield of 977.55 kg/hm2. Under the optimal planting density, Qisu No.3 could also harvest 3 000 kg/hm2 of Peril a frutescens dry leaves and 2 400 kg/hm2 of Peril a frutescens stems. This research would provide an important reference for the promotion, high-yield cultivation and comprehensive utilization of Peril a frutescens L.
Peril a frutescens L.Planting densityEconomic yieldAgronomic char-acters
NETL
NSTL
万方数据
维普
