Effects of planting density and row spacing on growth and yield of Carthamus tinctorius L.under mulch drip irrigation
[Objective]To study the effects of different planting density and row spacing on the growth and yield of Carthamus tinctorius L.,Which can coordinate the growth of Carthamus tinctorius L.and signifi-cantly improve the yield of Carthamus tinctorius L.filament and seed.[Methods]Field planting experiment was carried out in Yumin County,Tacheng Prefecture,Xinjiang from 2020 to 2021.Two-factor randomized block design was adopted,and four treatments were set for planting density:1.0×104 plants/667m2(A1),1.5×104 plants/667m2(A2),2.0×104 plants/667m2(A3)and 2.5×104 plants/667m2(A4),two treat-ments were set for row spacing:20 cm(B1)and 30 cm(B2).The effects of different planting densities and row spacing on the agronomic characters,dry matter accumulation and yield of Carthamus tinctorius L.were analyzed.[Results]The results showed that within a certain planting density range,the plant height,chloro-phyll content,dry matter accumulation,yield and other indicators of Carthamus tinctorius L.gradually in-creased with the increase of density,while the number of fruit balls per plant,the number of seeds per fruit and the thousand-grain weight gradually decreased with the increase of density,while different row spacing had little effect on each index of Carthamus tinctorius L..The comprehensive index and yield of Carthamus tinctorius L.under A3 B1 and A3 B2 treatment reached the highest level,and the filament yield under A3 treat-ment increased by 15.73%,11.23%and 7.97%respectively compared with A1,A2 and A4 treatment,and the grain yield increased by 18.75%,11.96%and 14.50%,respectively,compared with A1,A2 and A4 treatments.[Conclusion]Reasonable planting density(2.0×104 plants/667m2,20 cm(B1)or 30 cm(B2)equal row spacing)is the basis of high-yield and efficient cultivation mode of Carthamus tinctorius L.
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