Method for predicting density of wood of loblolly pine by utilizing near-infrared spectrum technology

Abstract

The invention discloses a method for predicting the density of wood of loblolly pine by utilizing a near-infrared spectrum technology. The method comprises the following steps: establishing a predicting model for the basic density of the wood of the loblolly pine on the basis of the near-infrared spectrum technology, and utilizing the model to fast and accurately measuring the basic density of the wood of the loblolly pine. The method disclosed by the invention has the beneficial effects that the defects of long determination time, large error due to artificial operation, high cost and the like in the conventional determination method for the density of the wood are overcome; chemicals do not need to be consumed, so that the harm of the chemicals to a human body is reduced; a sample is not consumed in the measurement process, the appearance and the internal quality of the sample can not be affected, and thus the method realizes typical nondestructive analysis and measurement; the testing repeatability is good, the analysis efficiency is high, the stability of a result is good, and a fast, simple and accurate testing method with low cost is provided for selective breeding of the loblolly pine in China.

Description

technical field [0001] The invention relates to a method for predicting the density of pine wood, in particular to a method for predicting the basic density of taeda pine wood by using near-infrared spectrum technology. Background technique [0002] Loblolly pine is native to the southeastern United States and is the main afforestation tree species in the southeastern United States. It has been introduced to China for more than 60 years. It has a straight and round stem shape and excellent material properties. It is one of the successfully introduced tree species. It is the strongest and most versatile wood in structural purposes. Its wood can be used for construction, pulp and fiber. Loblolly pine is rich in turpentine, which can be extracted and processed into rosin. Its quality is high, and it has become an important industrial timber afforestation tree species in vast areas of our country. In addition, the tree is tall and straight, with a crown like a torch and a stra...

AI Technical Summary

Problems solved by technology

When using this method to measure the density of loblolly pine wood, there are strict requirements on the sampling and preparation of the sample. The measurement process has cumbersome steps, time-consuming, great damage to the sample, and large human error and low efficiency. Inferior disadvantages

[0005] Some scholars have measured the air-dry density of wood at different moisture contents and the moisture content of boxwood, and there are also related studies on the basic density of blue eucalyptus and long-leaf pine, but no rapid measurement of the density of loblolly pine has been found. , accurate, simple, and low-cost forecasting method

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