The Screening Of Turfgrass Suitable For Growing Under The Walnut In Si Chuan Province

In the past ten years,the walnut industry in China has developed rapidly and the area under cultivation of walnuts has expanded rapidly.Understory grass cultivation is an eco-economic orchard management model.It is not only eco-friendly,but also can effectively inhibit the growth of weeds,achieve a clean field and reduce the cost of weeding.The key to grass cultivation is to find suitable grass species.Walnut has a strong allelopathic effect and light illumination under the forest is very low.Therefore,it is more difficult to screen grass species suitable for cultivating walnut grass.This study evaluated the adaptability of walnut turfgrass species to the understory habitat of walnuts,the variegated allelopathy effect of walnuts,and the adaptability to cucurbit.Research indicates:(1)Under field conditions,8 grass species have good adaptability to the understory habitat,including horseshoe-hoop gold and bentgrass;the better there is the hunting dog,v;the growth performance of other grass species is not suitable for the walnut undergrowth environment.One year after sowing,the coverage of the eight grass species from high to low were as follows: horseshoe golden,bentgrass,hunting dog v,white clover,alfalfa,tall fescue,bermudagrass,and bluegrass.In controlling weeds,horseshoe gold has the best effect,followed by bentgrass.Among the 8 grass species from June 2016 to November 2016,the invasive weed biomass from low to high was: horseshoe golden,white clover,alfalfa,bentgrass,hunting dog V,bluegrass,high Festuca,bermuda root.(2)One of the important reasons why horseshoe crab can adapt to walnut understory habitats is that the allelopathy of walnut leaf litter is not significant.The specific performance is as follows: in the litter potted plants,the peroxidase,malondialdehyde,soluble sugar,chlorophyll and other indicators of the horseshoe golden grass seedlings treated at25g·pot-1-100g·pot-1 did not appear significant with the CK group.difference.In the potted plants of walnut leaf litter,peroxidase(POD),malondialdehyde(MDA),soluble sugar,chlorophyll,and other indicators of the bentgrass seedlings were treated at 25 g·pot-1-100g·pot-1.Out of a certain inhibition effect.(3)The shading test showed that the horseshoe goldenrod and bentgrass grass seeds had better resistance to negative,and the horseshoe golden resistance was better.There were nosignificant differences in peroxidase(POD),malondialdehyde(MDA),soluble sugar,chlorophyll,etc.between 35% and 75% shading treatment of horseshoe hooves,and POD,chlorophyll,soluble sugar,etc.Indicators tend to increase with increasing shade.There was no significant difference between the treatment index and CK group at 35% cut bentgrass,but POD,soluble sugar,and chlorophyll content decreased at 75% treatment.(4)Studies have shown that horseshoe moss is the most suitable grass species for cultivation under walnut forests in test grasses.The allelopathy effect of horseshoe-gold on walnut leaves was not significant,and the resistance was negative.The plants were low and resistant to trampling,which facilitated the orchard operations and facilitated the management and management of the walnut garden.The bentgrass also has a good resistance to negative,has a certain allelopathy effect on the walnut leaves,but it can also be better adapted to the walnut environment,is a kind of grass species that can be cultivated under the walnut forest.The other grass species tested,such as Bermudagrass,Poa,etc.,are not suitable for cultivation under walnut trees.