锌肥对作物产量、子粒锌及土壤有效锌含量的后效  

Residual Effect of Zinc Application on Crop yield, Zinc Concentration in Crop Grain and Soil Available Zinc

作　　者：汪洪[1] 刘新保[1] 褚天铎[1] 杨清[1] 李春花[1] 

机构地区：[1]中国农业科学院土壤肥料研究所农业部植物营养学重点开放实验室,北京100081

出　　处：《土壤肥料》2003年第1期3-6,9,共5页Soils and Fertilizers

摘　　要：1 992年～ 1 998年在河南新乡缺锌褐土进行了微区定位试验 ,研究施锌对作物和土壤的长期效应。结果表明 :施锌提高第一茬作物小麦的分蘖数、穗数、穗长和第二茬作物玉米的穗长、穗粒数和粒重 ,从而显著增加小麦和玉米产量。不同用量的锌对作物产量影响未及显著差异水平。施锌对作物产量的后效不明显 ,最多能维持两茬作物。施锌显著提高土壤有效锌含量 ,尽管施用锌肥 ,经过 4茬之后 ,土壤有效锌含量仍维持在临界值之上 ,但作物产量没有多大影响。施锌显著提高前 2茬小麦和前The micro plot experiment was conducted on the cinnamon soil in Xinxiang, Henan province during the period of 1992～1998. The zinc initial application could increase the effective tillering and the ear length of winter wheat(1st crop) . The increase of corn(2nd crop) yield characteristics including the number of grains in each ear, the ear length and the mean weight of 10,00 grains was also contributed to Zn initial application. Therefore, the increase in yield of the first crop (wheat) and the second crop(corn) with all Zn initial application rates was noticed in the wheat corn rotation system, suggesting that the residual effects of Zn initial application could last for only two years. The concentrations of soil DTPA Zn and Zn in crop grains with all Zn initial application rates were more than those of free Zn treatment .Moreover, with the cropping, The concentrations of soil DTPA Zn and Zn in crop grains decreased. The 30～60 kg/hm 2 ZnSO 4·7H 2O should be applied to the wheat corn rotation system in Zn deficient calcareous soils of North China every two years.

关 键 词：锌肥 作物 产量 子粒锌 土壤 有效锌 含量 

分 类 号：S143[农业科学—肥料学]