發(fā)布時(shí)間：2018-08-30 09:27

【摘要】：【目的】探索谷類作物適宜的鋅肥種類及施用方式,為高效土施鋅肥提供參考。【方法】設(shè)置連續(xù)兩季小麥田間定位試驗(yàn),以不施鋅肥為對(duì)照,選取ZnEDTA(4kg/hm~2)和ZnSO_4(20kg/hm~2)2種鋅源,采用均施和條施2種施鋅方式,比較不同鋅肥以不同方式施入土壤后,在連續(xù)兩季小麥種植過(guò)程中土壤Zn形態(tài)的轉(zhuǎn)化規(guī)律及有效性的差異。【結(jié)果】與均施鋅肥相比,條施ZnEDTA和ZnSO_42種鋅肥后,在第1季土壤有效鋅、交換態(tài)鋅、松結(jié)有機(jī)態(tài)鋅的增加率分別為20.87%和374.03%,3 497.36%和1 077.39%,41.14%和256.38%,第2季增加效果有所降低;與4kg/hm~2 ZnEDTA處理相比,20kg/hm~2 ZnSO_4處理采用均施和條施2種方式均可以增加土壤有效鋅及松結(jié)有機(jī)態(tài)鋅、碳酸鹽結(jié)合態(tài)鋅含量,且兩季的增加效果均較好,但與第1季相比,第2季的效果極大降低;ZnEDTA處理均施和條施均可在第1季保持較高的交換態(tài)鋅含量(平均為0.26mg/kg),而在第2季該形態(tài)鋅大部分被固定(平均含量為0.02mg/kg)。【結(jié)論】條施較低量的ZnEDTA可有效增加當(dāng)季作物土壤中的有效鋅含量,但對(duì)后季作物生長(zhǎng)過(guò)程中土壤有效鋅含量的提升效果較小。
[Abstract]:[objective] to explore the suitable zinc fertilizer types and application methods for cereal crops, and to provide a reference for the application of zinc fertilizer in high-efficiency soil. [methods] two successive wheat field localizing experiments were conducted. Two zinc sources, ZnEDTA (4kg/hm~2) and ZnSO_4 (20kg/hm~2), were selected as control. In this paper, the transformation law and availability of soil Zn forms in two successive cropping wheat crops were compared by applying zinc fertilizer in two different ways. [results] compared with average zinc fertilizer, the transformation law and efficiency of soil Zn forms in two successive cropping wheat planting processes were compared with that of average zinc fertilizer. After ZnEDTA and ZnSO_42 were applied with zinc fertilizer, the increase rates of available zinc, exchangeable zinc and loose organic zinc in the first season were 20.87% and 374.033.497.36% and 1 077.3941.14% and 256.38%, respectively. Compared with 4kg/hm~2 ZnEDTA treatment, 20 kg 路hm ~ (-2) ZnSO_4 treatment could increase soil available zinc, loose organic zinc and carbonate bound zinc, and the effect of both treatments was better than that of the first season, but compared with the first season, the two treatments could increase the content of available zinc, organic zinc and carbonate-bound zinc, but compared with the first season, the two treatments could increase the content of soil available zinc and carbonate bound zinc, but compared with the first season. The effect of the second season greatly reduced the content of exchangeable zinc (0.26mg/kg) in the first season, but most of the zinc was fixed (0.02mg/kg) in the second season. [conclusion] the rate of strip application is lower. [conclusion] The amount of ZnEDTA can effectively increase the available zinc content in the crop soil of the current season. However, the effect of increasing soil available zinc content in the later crop growth process was relatively small.
【作者單位】： 西北農(nóng)林科技大學(xué)資源環(huán)境學(xué)院農(nóng)業(yè)部西北植物營(yíng)養(yǎng)與農(nóng)業(yè)環(huán)境重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41371288) 國(guó)家科技支撐計(jì)劃項(xiàng)目(2012BAD14B11)
【分類號(hào)】：S153.6;S512.1

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