Study On The Grass Cultivation Technique Of Castanea Henryi

Castanea henryi(skan)Rehd.et Wils.is an important non-wood tree species.The grass cultivation in the orchard can improve the physical and chemical properties of the orchard soil,reduce the management cost,save manpower and material resources,and increase the output of the orchard.This experiment uses’Huali No.4’as a test material,and after planting Lolium perenne,Festuca elata,Medicago sativa and Trifolium repens,through the analysis of soil physical and chemical properties,photosynthetic efficiency analysis of Castanea henryi,fruit yield and quality analysis,and data analysis,the preliminarily explored the Castanea henryi orchard.The feasibility and effect of grass cultivation technology are aimed at finding a suitable method for grass cultivation in southern Castanea henryi orchards,and providing a theoretical basis for high-yield cultivation of Castanea henryi.Results are as follow:1.Grass cultivation can improve the physical and chemical quality of the soil of the Castanea henryi orchard and increase the soil enzyme activity.The highest average daily soil temperature was Lolium perenne Castanea henryi orchard,and the soil temperature was 28.73 ℃,which was 1.2 ℃and 5.59%higher than that of clear farming.The grass cultivation increased the soil moisture content of the Castanea henryi orchard,and the Lolium perenne Castanea henryi orchard was especially improved.The soil moisture in the 0-20cm soil layer,the 20-40cm soil layer and the 40-60cm soil layer were 18.52%and 19.11%,19.20%.respectively.The grass planting has a significant improvement on the soil bulk density of the Cas-tanea henryi orchard.In the 0-20cm soil layer,the mixed seeding orchard,the Festuca elata orchard,the Lolium perenne orchard,the Trifolium repens orchard and the Medicago sativa orchard Reduced by 3.08%,3.06%,5.32%,4.01%and 3.56%.In the 20-40 cm soil layer,the soil bulk density decreased by 3.52%,1.52%,5.21%,3.52%and 3.68%,respectively.In the 40-60 cm soil layer,the soil bulk density decreased by 3.71%,3.71%,4.81%and 3.82%,respectively.And 3.82%.The soil porosity of 0-20cm and 20-40cm soil layers in Lolium perenne was increased by 6.70%and 19.89%,respectively.In the 0-20cm soil layer,the soil organic carbon content of Festuca elata Castanea henryi orchard,Medicago sativa Cas-tanea henryi orchard,Lolium perenne Castanea henryi orchard.,mixed planting Castanea henryi orchard and Trifolium repens Castanea henryi orchard increased by 72.32%and 40.48%,respectively.201.21%,19.04%,52.38%.Compared with the clear farming grass cultivation,the total nitrogen content of the Castanea henryi orchard was increased by 122.22%,138.10%,and 144.32%,respectively.The total phosphorus content of the soil treated with Lolium perenne in 0-20cm and 20-40cm soil layers.Compared with the clear farming,it increased by 31.18%and 8.78%,respectively.The total potassium content in the soil of 0-20 cm soil in Festuca elata orchard,Medicago.s’aliva orchard,Lolium perenne orchard and Trifolium repens orchard was 24.05%,1.10%,49.00%and 17.21%,respectively.The soil available Phosphorus content in the 0-20 cm soil layer of tall Castanea henryi,Medicago sativa,Lolium perenne,mixed seeding and Trifolium repens was increased by 75.00%,59.21%,59.23%,6.58%,60.21,respectively.%,the available potassium content increased by 35.52%,17.11%,139.47%,13.16%,60.52%,respectively.The soil catalase activity in the Festuca elata orchard,the Medicago saliva orchard,the Loliu,m perenne orchard,the mixed seeding orchard and the Trifolium repens orchard in the 0-20 cm soil layer increased by 17.49%,16.46%,21.60%and 19.54%,respectively,compared with the clear farming.The soil invertase activity of 15.43%and soil was increased by 7.69%,16.15%,47.40%,16.05%and 28.85%,respectively.Among them,the effect of Lolium perenne grass-treated Castanea henryi orchard is relatively better,followed by Trifolium repens and Medicago sasaliva,indicating that Lolium perenne is planted in the Castanea henryi orchard,which has better effect on soil physical and chemical quality.2.Grass cultivation can improve the photosynthesis efficiency of Castanea henryi orchard.The average daily photosynthetic rate of leaves treated with different grasses from high to low was:Lolium perenne orchard>Medicago sativa orchard>Trifolium repens orchard>Festuca elata orchard>mixed seeding orchard>clear farming.The daily mean value of leaf transpiration rate in Lolium perenne orchard,Medicago sativa orchard and Trifolium repens orchard was 1.48,0.74 and 0.70 mmol/m2·s higher than that of clear farming.The average daily value of leaf water use efficiency under the cultivation of grass was from high to low:Festuca elata orchard>Trifolium repens orchard>Lolium perenne orchard>Medicago sativa orchard>mixed seeding orchard>clear farming.After analysis by subordinate function method and principal component analysis method,the photosynthetic efficacy rankings of different processed grasses were as follows:Lolium perenne orchard>Trifolium repens orchard>high wool orchard>Medicago sativa orchard>mixed seeding orchard>Clear farming.Under the condition that Principal Component Analysis can provide 88.48%of information,the comprehensive score of photosynthesis efficiency of 2.70 of Lolium perenne Castanea henryi orchard is higher than that of clear farming orchard 0.94 by 187.23%,and the effect is remarkable.3.Grass cultivation can improve the yield and quality of Castanea henryi.The grass cultivation can increase the fresh weight and dry weight of Castanea henryi,and the fresh weight and dry weight of Lolium perenne Castanea henryi orchard are 7.21g and 3.38g,respectively,which is significantly higher than that of clear farming.Part of the grass cultivation treatment can increase the yield of Castanea henryi in the Castanea henryi orchard.The yield of Castanea henryi in the Loliu,m perenne Castanea henryi orchard is the highest,with the average value reaching per 8.52kg,which is per 0.55kg compared with the clear farming.The order of yield of Castanea henryi in different grasses was as follows:Lolium perenne orchard>Medicago saliva orchard>Trifolium repens orchard>clear farming>mixed seeding orchard>Festuca elata orchard.The indexes of longitudinal and transverse diameter,starch content,soluble sugar content,reducing sugar content and seed setting rate of Castanea henryi L.cultivated by Lolium perenne were higher than other treatments,and the moisture content,open rate,yield,etc.of fruit were measured.index.After the membership function method and principal component analysis method were used to analyze the mathematical statistics,the comprehensive scores of the yield and quality of Castanea henryi were as follows:Lolium perenne orchard>Medicago sativa orchard>Trifolium repens orchard>clear farming>Festuca elata>mixed seeding.In summary,through analysis,the grass cultivation technology is applicable to the southern Castanea henryi orchard,and the Lolium perenne is the ideal grass species for the cultivation of the Castanea henryi orchard.