Capability of crop canopy sensing to predict crop parameters of cut grass swards aiming at early season variable rate nitrogen top dressings
Capability of crop canopy sensing to predict crop parameters of cut grass swards aiming at early season variable rate nitrogen top dressings
复制标题
作物冠层传感预测割草田作物参数的能力，针对早季可变氮追肥
DOI：
10.1017/s2040470017001364
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
J. Jasper
中科院分区：
文献类型：
--
作者：
G. Portz;M. Gnyp;J. Jasper
本研究的目的是评估实际的生物量和氮的吸收估计与雅苒氮传感器在集中管理的草地在欧洲的几个试验地点。将数据集按位置分为前两次切割的独立校准数据（英国和芬兰）和验证数据（德国）。Yara氮传感器读数与氮吸收的相关性（R²=0.71）比实际生物量（R²=0.53）更好。在2 μ m切割下，两个参数的R²值均较高（0.80和0.56）。与德国草试验的交叉验证表明，预测氮吸收的潜力（R²>0.8）。可以得出结论，该技术有可能指导管理决策和欧洲草地上的变量氮的应用。
This study aims to evaluate actual biomass and N-uptake estimates with the Yara N-Sensor in intensively managed grass swards across several trial sites in Europe. The dataset was split by location into an independent calibration data (UK and Finland) and a validation data (Germany) for the first two cuts. Yara N-Sensor readings were better correlated with N-uptake (R²=0.71) than actual biomass (R²=0.53) for the 1ˢᵗ cut. At the 2ⁿᵈ cut, the R² values for both parameters were higher (0.80 and 0.56). A cross-validation with a German grass trial indicated the potential for predicting N-uptake (R²>0.8). It can be concluded that the technology has the potential to guide management decisions and variable rate nitrogen application on European grass swards.
影响因子：
1.9
作者：
J. Schellberg;Erik Verbruggen
通讯作者：
J. Schellberg;Erik Verbruggen