| Forestry waste is waste generated in the process of forestry nurturing,production and operation,processing,etc.The traditional disposal methods are mostly incineration and random disposal,which cause adverse effects on the ecological environment and are also a huge waste of resources.How to reasonably treat and dispose of forestry waste has attracted the attention of many scholars in the field of agriculture,forestry and ecological environment.In this paper,peach tree branches collected from orchards in the hilly areas of southern Jiangsu province were crushed and processed,and pig manure generated from local farms was aerobically composted according to different mass ratios.5 groups of different mass ratios of waste branches to pig manure were set for the experiments,namely:9:1,7:3,5:5,3:7,while the high lignocellulose content of branches was considered,and the 9:1 treatment was set for the addition of The treatment with exogenous fungicides was set for the 9:1 treatment,which was recorded as 9:1（E）.The changes of composting temperature,p H,EC,organic matter,total N,GI,fast-acting potassium and effective phosphorus were dynamically analyzed during the composting process,which were used to evaluate the decay of the piles and to screen the optimal ratios.In the field experiment,10 groups of treatments were set up,FW stands for waste branches,P stands for pig manure,and the subscript numbers represent the proportion of their mass.FW stands for waste branches,P stands for pig manure,and the subscripted numbers represent the proportion of its mass,of which the six treatments of compost are recorded as FW9:P1（E）,FW9:P1,FW7:P3,FW5:P5,FW3:P7,FW1:P9,respectively,and four additional treatments are added to the actual fertilization situation of local orchards,which are the products of pure pig manure decomposition,recorded as PM;local The local commercial organic fertilizer applied year-round was recorded as CK;organic-inorganic compound treatment（FW9:P1+C,FW5:P5+C,see experimental design）.The product of pig manure rotting,recorded as PM;the local perennial application of commercial organic fertilizer recorded as CK;organic-inorganic compound treatment（FW9:P1+C,FW5:P5+C,see the experimental design）.The field experiment was conducted to investigate the effects of fertilizer application to 2-year-old grapes of Sunshine Rose（Shine Muscat）on chlorophyll content,main tip length,and ground stems in the leaves of grapes at the fruiting stage;and the effects of solid to acid ratio,soluble sugar,soluble solids,titratable acid,and edibility in the fruit at the fruiting stage.Changes in p H,organic matter content,total nitrogen content,fast-acting phosphorus content,and effective potassium content of the soil were also collected before fertilization,during the fruiting period,during the fruiting period,and one year after fertilization to study the effects of compost products on soil and fruit quality and to screen the treatment for optimal fertilization efficiency.The main findings of the composting process and field trials are as follows:（1）Except for the piles of 9:1 and 7:3 treatments which did not reach the high temperature stage,all the treatments reached the high temperature stage（>50°C）after 2-4 d of composting,and the high temperature lasted for more than 7 d.Among them,the 9:1（E）treatment lasted the longest time of high temperature stage,which was more than 10 d.The GI values of the piles reached more than 50%（10th d）and 80%（20th d）for all treatments except for the 9:1 and 7:3treatments.The p H and EC values did not change significantly during the composting process.The p H values of all the treatment piles reached the decomposition standard by the 20th day of composting,and the EC values met the decomposition standard during the whole composting process.（2）The organic carbon of the compost pile showed a continuous decreasing trend,and the organic carbon content of the compost pile decreased from 34.19%to 55.53%at the end of composting compared with the 0th day;the total nitrogen content showed a decreasing and then increasing trend,and increased by 28.08%to 48.51%compared with the 0th day;the effective phosphorus and fast-acting potassium content of the compost pile increased by 8.77%to 200.00%and 66.14%to 385.55%compared with the 0th day,respectively.The effective phosphorus and fast-acting potassium contents of the compost pile increased by 8.77%～200.00%and66.14%～385.55%,respectively,compared with d 0.According to the comprehensive ranking results of principal component analysis and the application of forestry waste resources,the compost ratios of 5:5 or 9:1（E）were preferred for promotion.（3）The compost product increased the chlorophyll a content in grape leaves to4.52%～38.87%and the total chlorophyll a+b increased by 4.92%～38.87%,during the fruiting period.Soluble protein content in the leaves increased by 48.52%to 149.12%,but there was no significant effect on ground diameter,main tip length,or soluble sugar in the leaves at that period.At the fruiting stage,the soluble solids content increased by 0.20%～39.13%,the titratable acid content decreased by 0.03%～27.59%,and the solid to acid ratio increased by8.75%～68.53%,but did not significantly increase the soluble sugar content and edibility in the fruits.（4）During the whole fertilization cycle,the soil p H of each treatment showed a trend of first decreasing and then increasing,and the final p H of the soil was in the range of 6.69～7.84;except for four groups of treatments,PM,CK,FW1:P9 and FW3:P7,the soil organic matter content of the remaining treatments showed a trend of first increasing and then decreasing and then increasing,and finally was in the range of 16.72～21.11 g/kg,which was higher than that before Except for the FW9:P1 treatment,the soil total nitrogen content of the remaining treatments showed a trend of increasing,then decreasing and then increasing,ending at 0.96～1.18g/kg,an increase of-0.03%～19%compared with that before fertilization;the quick-acting phosphorus content of all treatments showed a trend of increasing and then decreasing,ending at 12.80～28.85 mg/g,an increase of 13.58%～155.98%compared with that before fertilization;the fast-acting potassium content of all treatments showed a trend of increasing all the time,finally at 0.20～0.42g/kg,an increase of 147.20%～412.88%compared with that before fertilization,indicating that overall forestry waste fertilization has the effect of improving fertility for planting soil.（5）Based on the forestry waste composting test and the two tests to verify the fertility of forestry waste composting products,the treatment of 9:1（E）was selected as the first candidate ratio based on the best final result matching of the two,which is the primary choice for future practice promotion and demonstration. |
