杉木种子园测土施肥模式

通过对福建省三明市官庄林场杉木种子园深翻施肥试验结果进行数理统计分析,以获得土壤养分含量对球果产量的多元回归方程,作为预测种子园球果产量的模式;进而求得在一定限制条件下能获取最高产量的土壤养分状况,作为种子园土壤养分标准状况。其它杉木种子园土壤经测定养分后与之相比,便知土壤养分缺乏的种类和程度,由此确定合理施肥方案,这便是测土施肥模式。

THE FERTILIZATION MODEL BASED ON THE SOIL NUTRIENT IN CHINESE FIR SEED ORCHARD

Based on the study of fertilization and deep ploughing in seed orchard of Chinese fir in Guanzhuang Forest Farm, Fujian Province. According to mathematics statistical inference, we can regard the regression equation between soil nutrient and the yield of cones as a model to forecast the output of cones in seed orchard. As a result, the standard of soil nutrient, with which the highest yield of cones would be produced, is set up. We have got to determine the nutrient contents in the soil in other Chinese fir seed orchard and contrast the nutrient with the criterion. We, then, know how much nutrient and what kind of nutrient to be needed in the soil. So an adequate fertilization can be applied in seed orchard. Above-mentioned is called the fertilization model in seed orchard of Chinese fir.