The Effect Of Peat On Soil Property And Biology Of Peach Tree

Peat has properties of water and nutrient conservation, its soil organic matter and cellulose was also rather abundant, so peat is an important soil amendment. This experiment is mainy study the effect of peat on soil property and biology of peach tree. For the purpose of finding a new soil amendment style which using peat to improve orchard's soil fertility and fruit quality. The main results were as follows.1. The treatment which chicken manure 50kg and peat 20kg individual plant can significantly improve the soil water content than the treatment which chicken manure 50kg individual plant and CK. Its water content is highest in soil layers of 10cm～20cm, 20cm～30cm and 30cm～40cm, and increased 20.26%, 36.44% and 37.10% separatly. Its soil organic matter and CEC content were enhanced 79.00% and 11.45% than CK separately. The soil pH of this treatment was lowest in all the treatments, and decreased 4.33% than CK. Its content of total-N and available-K and available-Cu was significantly increased than the treatment which chicken manure 50kg individual plant, and its available Fe and available B were increased 53.66% and 62.81% separately than CK.2. The treatment which chicken manure 50kg and peat 20kg individual plant can significantly increased the root total biomass 2.4 and 53.9 times separately than CK in 2005 and 2006. Its root length density were 0.281cm·cm-3, 1.264cm·cm-3 and 1.333cm·cm-3 in different soil layers, and also significantly increased than the treatment which chicken manure 50kg individual plant and CK. Its root total biomass and root length density were also significantly increased than the treatment which chicken manure 100kg and peat 10kg individual plant.3. Peat can increase leaves'nutrient. The treatment which chicken manure 50kg and peat 20kg individual plant can significantly enhance the content of total-N, total-P, total-K, total-Fe, total-Mn, total-Zn and total-B in leaves than the treatment which chicken manure 50kg individual plant. Its total-Cu content is also increased than CK. In this treatment, the content of total-N, total-K, total-Mn and total-Zn in leaves is highest between all the treatments, and separately increased 32.29%, 23.62%, 30.13% and 59.39% than CK. 4. The effect of peat on average fruit weight, firmness, TSS, and TS is little significantly. But the treatment which chicken manure 50kg and peat 20kg individual plant can significantly increase the ratio of TSS/TS and improve fruit field than the treatment which chicken manure 50kg individual plant and CK. In this treatment, the ratio of TSS/TS and fruit field were separately increased 21.09% and 43.08% than CK.5. The correlation between soil and leaf nutrition, peach fruit quality and yield was analyzed in the experiment. The results indicated that the content of soil organic matter, total-K, CEC, available-Zn and available-B in soil was positively related to the content of total-N, total-P, total-Fe and total-Zn in leaves. The available-B of soil had negative with TSS in fruit, and other nutrition had no significant correlation with fruit quality. The average fruit weight had significant negative correlation with total-Fe and total-Mn in leaves, but positive correlation with total-B in leaves.The fruit firmness had positive correlation with total-Fe, total-Mn and total-Cu. The TSS also had positive correlation with total-B in leaves. But fruit TS had negative correlation with total-Fe, total-Mn and total-Cu. The TSS/TS had significant positive correlation with total-Fe, total-Mn and total-Cu in leaves. The fruit field was related to the content of total-N, organic matter, available-K, CEC, available-Fe, available-Cu, available-Zn and available-B of soil in a certain extent, and was positively related to total-N, total-K, total-Fe, total-Cu, total-Zn and total-B in leaves.