灰潮土田稻麦油轮作锌肥效应研究

The Effects of Zinc Fertilizer on Rice, Wheat and Rape Rotation in the Calcareous Damp Soil Paddy field

在江汉平原灰潮土田和利用其耕层土壤进行田间和盆栽试验，对水稻、小麦和油菜施用锌肥，结果表明：①３ 种作物施用锌肥增产效果显著，其中中稻和油菜的增产率比小麦的高，水稻的常规品种又比杂交品种的增产率高。②施用锌肥具有一定的后效作用；在水旱轮作中，锌肥以施在水稻上为好；如果中稻和油菜轮作，两者都应施用锌肥；如果是中稻和小麦轮作，则可以只在水稻上施用锌肥。

Under pot culture and field conditions,rice,wheat and rape were fertilized with zinc fertilizer on the calcareous damp soil paddy field in Jianghan Plain. The results showed that:① The yields of the three crops were remarkably increased. The increasing rate of medium rice and rape were higher than that of wheat, while the rate of conventional rice breed was higher than that of hybrid rice breed. ② Under rotation,zinc fertilizer applied on the former crop had after effects on the latter crop to a certain degree. Under rotation of rice and dry crops, zinc fertilizer was better applied on rice. Under rotation of medium rice and rape,both crops should be applied with zinc fertilizer. Unde rotation of medium rice and wheat, zinc fertilizer could be only applied on rice.