Effects of plant growth retardants on population characteristics and lodging resistance of high yield winter wheat in Xinjiang
The high yield winter wheat variety'Xindong 52'was used in this research,wheat seedlings were sprayed with two types of growth retardants of four Cycocel concentrations of 4 500,5 250,6 750 mL·hm-2,and 9 000 mL·hm-2,as well as three Maibo concentrations of 225,375 g·hm-2,and 525 g·hm-2,respectively,and the same amount of water was sprayed at the same time as the control.The effects of plant growth retardants on the number of stems and tillers,leaf area index,grain to leaf ratio,dry matter accumulation,lodging resistance and yield of wheat population was investigated and analyzed.The results showed that under the 5 250 mL·hm-2,225 g·hm-2 and 525 g·hm-2 treatments,the average spike number of wheat was 6.45×106 per hectare,the average number of grains number per spike was 45.76,and the average 1 000-grain mass was 56.37 g,3.34％,4.03％,and 13.48％higher than the control,respectively.The tillering rate ranged from 49.57％to 52.16％.The average dry matter accumulation in population was 36 555.08 kg·hm-2.The rapid growth period of average dry matter ac-cumulation per plant was 39.6 days,and the maximum leaf area index was 8.8 to 9.6.The average grain number-leaf area was 0.41 grains·cm-2 and grain mass-leaf area ratio was 23.27 mg·cm-2,which increased by 1.28％and 16.13％compared with the control,respectively.The highest grain yields were observed in the above three treatments,which were 18.38％,22.24％and 24.03％higher than the control,respectively.The treatment of 9 000 mL·hm-2 Cycocel and 525 g·hm-2 Maibo significantly reduced the height of'Xindong 52'and decreased the gravity center of wheat plant.Under these two treatments,the average stem lodging index and the proportion of bas-al internode ratio of wheat at 20 days after flowering were reduced by 36.74％and 22.01％respectively compared with the control,increased stem diameter and improved stem morphology,and enhanced plant lodging resistance and population ventilation and light transmission capacity.
万方数据
维普
