Effects of Cutting Intensity and Flowering Period on Reproductive Characteristics of Achnatherum inebrians
In order to study the growth characteristics and biomass changes of Achnatherum inebrians un-der different cutting intensities in the hope of ascertaining the inhibitory effects of different cutting intensi-ties on the reproductive characteristics of Achnatherum inebrians.This experiment focuses on Ach-natherum inebrians growing in desert,steppe,and meadow habitats.During the flowering period of Ach-natherum inebrians,samples were taken and measured during the fruiting period.Based on the division of the plant bundle cross-section half ratio,0%(CK),25%,50%,75%,75%and 100%were set to measure morphological characteristics,fruiting setting characteristics,biomass and other indicators,thus selecting the better and targeted cutting intensity.The research results indicated that under 5 different cutting in-tensities,compared with CK in various habitats,25%to 100%cutting intensities had a significant inhibito-ry effect on the number of reproductive branches,thousand grain weight,and seed setting rate of the Ach-natherum inebrians;100%cutting inhibited the total biomass,nutrient branch biomass,and reproductive branch biomass of each habitat(P＜0.05).In addition,steppe habitats were mostly equal compensated or undercompensated,while desert and steppe habitats were mostly undercompensated.The compensation in-dex generally decreased with the increase of cutting intensity,and heavy cutting would cause significant un-dercompensated growth of the drunken horse grass.In short,high cutting during the flowering period of the Achnatherum inebrians can control its sexual reproduction and ultimately achieve effective prevention and control.
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