Study On The Effect Of Use Of Fire In Silviculture On Soil Physical And Chemical Property Of The Pure Bamboo Stand

Bamboo plants in China, the most widely distributed, the largest area, the highest value of fine bamboo species. It to become useful, high yield, cutting short a long period of profitability and effective, sustainable use of afforestation.The impact of fire on forest ecosystems is double-sided, pros and cons. This study was initiated in the outskirts of the western suburbs of Meiling National Forest Park in Nanchang, to select a lhm2 pure bamboo, silvicultural use of fire by the time interval of two months, each time the burning time set to 30min,60min,90min,120min and of CK5 processing, repeated three times, each with fire after the 0-20cm soil physical properties of sampling and analysis unified analysis of soil sampling and laboratory tests completed every two months, the last time the use of fire, and research silvicultural use the effects of fire on the chemical nature of the 0-20cm soil. The study results are as follows:Silvicultural use of fire 30min layers of soil moisture variation is not obvious, a downward trend with fire 60min 0-5cm,5-10cm soil moisture content, fire 90min 0-5cm,5-10cm,10-15cm soil moisture content of a downward trend, reduce soil water rates between layers of soil with the 120min fire. With the fire longer, the soil moisture content greater the decline. Fire time compared with the non-burning forest (CK), saturated soil moisture content variation between the different soil layers is not obvious.The different silvicultural use of fire increased in 0-20cm soil temperature, maximum the 0cm temperature increased, the 4th highest fire 120min,241.07℃,5 cm,10 cm,15 cm,20cm depth soil temperature increased ratelest than the the 0cm temperature, the higher the temperature, the longer the soil with fire time.Silvicultural use of fire duration and interval of 0-20cm soil layer soil pH.Silvicultural use of fire after the burned soil organic matter content in addition to the use of fire 30min, the rest with fire time can increase soil organic matter content, the longer the fire time, the greater the changes in organic matter content. July 23,20110-5cm fire 120min increase in organic matter content than CK increased 44.17g/kg.All silvicultural use of fire have increased in the soil total nitrogen, total phosphorus in soil, soil total K content of soil available nitrogen, available phosphorus, available potassium,0-5 cm, the fastest growing. CK, of which the 3rd fire 60min total soil nitrogen content increased 1.04g/kg the 4th fire 30min soil total phosphorus content increased 0.88g/kg, the 4th increase fire 90min soil potassium content increased 50.38mg/kg, the 4th increase in the use of fire 60min soil available nitrogen 105mg/kg,the 3rd fire 90min available phosphorus content increased 15.03mg/kg, the 3rd fire 30min potassium content increased 81.15μg/kg.The use of low intensity artificially controlled fire, soil organic matter, nitrogen and available nitrogen, available phosphorus and total phosphorus, total potassium and potassium increase, improve soil nutrient, is conducive to soil fertility improvement.