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作物对锰的需要量很小,但缺锰也会影响作物生长发育及产量。据田间观察:缺锰的麦苗苗体发黄,中下部叶片有黄褐色斑点,叶片下垂,连片干枯。在部分缺锰的土壤,特别在石灰性冲积母质上形成的轻质土壤上,小麦施用锰肥有一定的增产效果。为了探明施用锰肥对小麦吸水保水能力的影响,我们在北京大兴县和房山县进行了试验。供试品种是丰抗二号;土壤属于永定河石灰性冲积物上形成的潮土(有效锰锌在临界值以下)。小区试验设4个处理:作基肥每亩施硫酸锌2斤,硫酸锰2斤,硫酸锰2斤+硫酸锌2斤,对照。小区面积0.03亩,每处理重复3次。大田对比试验,
Crop demand for manganese is small, but manganese deficiency can also affect crop growth and yield. According to field observations: lack of manganese seedling seedling body yellow, middle and lower leaves have brown spots, leaves sagging, contiguous dry. In some manganese-deficient soils, especially on the light soil formed by alluvial alluvial alpaca, the application of manganese fertilizers to wheat increased yield. In order to find out the effect of applying Mn fertilizer on water absorption and water retention ability of wheat, we conducted experiments in Daxing County and Fangshan County in Beijing. The tested varieties were Fengkang No.2; the soil belongs to the fluvial alluvial soil formed on the Yongding River (effective Mn and Zn below the critical value). Community trial set up four treatments: basal fertilizer applied per acre 2 kg of zinc sulfate, 2 kg of manganese sulfate, 2 kg of manganese sulfate + 2 kg of zinc sulfate, control. Residential area of 0.03 acres, each treatment repeated three times. Field comparative test,