黑土区长期施肥对大豆光合产物分配的影响(英文)

被引：2

作者：

乔云发

韩晓增

苗淑杰

王树起

机构：

[1] 中国科学院东北地理与农业生态研究所

来源：

大豆科学 | 2009年 / 28卷 / 03期

关键词：

光合产物; 大豆; 长期施肥; 黑土;

D O I：

暂无

中图分类号：

S565.1 [大豆];

学科分类号：

摘要：

在东北黑土区中心-中国科学院海伦实验站进行盆栽试验,研究不同施肥处理对大豆光合产物分配的影响。设5个肥料处理,分别为无肥(CK)、氮磷(NP)、氮钾(NK),氮磷钾(NPK)和化肥有机肥配施(NPK+OM),同时进行相应肥料的无作物处理。结果发现:光合产物的分配趋势表现出分配到地上部的比例逐渐增加,由35%增加到66%,同时地下部所占有的比例相应减少,由65%降低到34%。其中分配到根中的光合产物有4% ～20%通过根系呼吸而消耗。碳同化产物的分配受施肥的影响(P<0.05)。随着大豆的生长,土壤呼吸速率逐渐增加,在培养后的第77天,CK、NP、NK、NPK和NPKOM处理土壤呼吸速率达到最大值,分别为113、164、143、222、274 mg C.cm-2.h-1,然后逐渐降低,到生育末期达到最小值。不同施肥处理土壤呼吸速率存在差异,大小顺序为NPK +OM>NPK>NP >NK>CK,在整个生长季的变化范围分别为29 ～302,25 ～238,25 ～185,24 ～160 and 20 ～129 mg C.m-2.h-1。

引用

页码：477 / 482

页数：6

共 12 条

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