夏玉米不同部位干物质临界氮浓度稀释曲线的构建及对产量的估计

苏文楠, 解君, 韩娟, 刘铁宁, 韩清芳

Construction of critical nitrogen dilution curve based on dry matter in diffe rent organs of summer maize and estimation of grain yield

SU Wen-Nan, XIE Jun, HAN Juan, LIU Tie-Ning, HAN Qing-Fang

图4 基于茎干物质建立的临界氮浓度曲线得到的RY与NNI和AND的关系 缩写和符号同图3。** 表示在P < 0.01水平上显著。

Fig. 4 Relationships between relative yield (RY) and the nitrogen nutrition index (NNI), relative yield (RY) and the accumulated nitrogen deficit (AND) of two maize hybrids with varied N rates on the bases of stem dry matter N dilution curves Abbreviations and symbols are the same as those given in Fig. 3. ** indicates significant difference at P < 0.01.