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引用次数: 29
摘要
通过对圆盘计、剑棒计和电容计的比较,探讨了不同估算方法对蒂莫西(Phleum pratense L.)-草甸羊茅(Festuca pratensis Huds.)牧场牧草质量(HM)的预测能力。在每台仪器和相应的切割HM (<1 cm)上共进行了714次配对观察。线性模型充分解释了HM的变化。由于DAY对刀杆和电容计的参数估计有显著影响,因此对每种情况(DAY)分别进行了比较。r2值在0 ~ 0.91之间,RSD值在132 ~ 1151 kg ha-1之间。圆盘计和刀杆计预测HM kg ha-1最准确,电容计预测精度最低。圆盘式仪表的优点是模型参数每天都很稳定。使用摇杆的好处是可以将阅读的内容直接应用到实践中。没有一种方法是正确的。
Comparison of Three Indirect Methods for Prediction of Herbage Mass on Timothy-Meadow Fescue Pastures
A comparison of a disk meter, sward stick and capacitance meter was conducted to determine the prediction ability of different methods for estimation of herbage mass (HM) on timothy (Phleum pratense L.)-meadow fescue (Festuca pratensis Huds.) pastures. A total of 714 paired observations was made on each instrument and corresponding cut HM (<1 cm). The variation in HM was adequately explained by linear models. Comparison was made separately for each occasion (DAY) since DAY had a significant influence on the parameter estimates for the sward stick and capacitance meter. The r 2 values varied between 0 and 0.91 and the residual standard deviations (RSD) between 132 and 1151 kg ha-1. The disk meter and the sward stick predicted most accurately HM kg ha-1, while the capacitance meter was the least accurate. The advantage of the disk meter was the stability of model parameters from day to day. The advantage of the sward stick is that the readings can be applied directly into practice. None of the methods is re...
期刊介绍:
Acta Agriculturæ Scandinavica Section B publishes original research in applied soil and plant science with special attention given to to crop production in agri- and horticultural systems. We welcome manuscripts dealing with:
Climate smart and sustainable crop production systems
Water and nutrient efficiency
Soil conservation and productivity
Precise agriculture systems
Applications of bio- and nanotechnology
Digitalisation and robotics
Soil-plant interactions
Acta Agriculturæ Scandinavica, Section B – Soil & Plant Science forms part of a series of titles published on behalf of the Nordic Association of Agricultural Science (NJF). The series also includes Section A - Animal Science .