锌肥施用对我国小麦籽粒锌含量的影响.

In order to investigate the effects of different application methods of zinc fertilizer on the zinc content of wheat (Triticum aestivum L.) grains in China, published literature was reviewed and relevant data was collected for analysis. The results show that the main application methods for zinc fertilizer in China were soil, foliar, and soil+foliar application, and the average zinc input of soil application (12.6 kg·hm-2 ) was higher than that of foliar application (1.57 kg·hm-2 ) . The distribution of zinc content in wheat grains without zinc fertilizer ranged from 14.6 mg·kg-1 to 50.0 mg·kg-1, and 95.3% of wheat grains had zinc content <40 mg·kg-1 . The distribution of zinc content in grains after soil+foliar application ranged from 24.0 mg·kg-1 to 70.9 mg·kg-1, and 76.2% of wheat grains had zinc content >40 mg·kg-1 . The average increase rate of zinc content in grains under different application approaches was as follows：soil+foliar application (62.6%) > foliar application (47.2%) > soil application (24.6%) . There was a significant positive correlation between the increase rate of wheat grain zinc content and the amount of exogenous zinc input in soil and foliar application, i.e., when the zinc input increased by 1 kg per hectare, the zinc content in grains increased by 0.74% and 16.39%, respectively. The average utilization efficiency of zinc fertilizer after foliar application (7.27%) was higher than that of soil application (0.59%) and soil+foliar application (0.94%) . Therefore, the zinc content of wheat grains could be increased using different application methods; soil + foliar application was most effective, while foliar application possessed the highest zinc utilization efficiency. [ABSTRACT FROM AUTHOR]