苜蓿茬不同种植年限玉米根系生理特性及其产量

生态学杂志

苜蓿茬不同种植年限玉米根系生理特性及其产量

张玉芹^1**,杨恒山¹,范秀艳¹,高聚林²

（¹内蒙古民族大学农学院，内蒙古通辽 028042； ^2内蒙古农业大学农学院，呼和浩特 010031)

出版日期:2014-05-10 发布日期:2014-05-10

Root physiological characteristics and yield of maize with different cultivation durations in alfalfa stubble land.

ZHANG Yu-qin^1**, YANG Heng-shan¹, FAN Xiu-yan¹, GAO Ju-lin²

(¹College of Agronomy, Inner Mongolia University for the Nationalities, Tongliao 028042, Inner Mongolia, China; ² College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China)

Online:2014-05-10 Published:2014-05-10

摘要/Abstract

摘要：

以7龄紫花苜蓿地为前茬，连续4年采用同一高产栽培方案种植玉米，并测定其根系分布、根系生理指标和产量变化。结果表明：苜蓿翻耕种植玉米后，随种植年限增加，产量下降，各土层玉米根系生物量在吐丝期成熟期均呈下降趋势，随土层加深差异增大；0～20 cm土层玉米根重占总根重(0～60 cm)的比例随玉米种植年限增加而升高，而40～60 cm土层随玉米种植年限增加而降低；吐丝期和乳熟期各土层根系活力和SOD酶活性均随玉米种植年限增加而降低；POD酶活性除吐丝期20～60 cm差异不显著外，各时期、各土层随玉米种植年限增加而下降；乳熟期各土层根系MDA的含量均随玉米种植年限增加而增加，且随土层加深差异增大。

关键词: 固氮树种, 磷脂脂肪酸, 杉木, 酶活性

Abstract: High-yield maize was planted in a preceding 7-year-old alfalfa land for four consecutive years, and the vertical distribution of root, physiological characteristics of root and yield of maize were measured. The results showed that the maize yield and the root dry weight at the silking and milking stages decreased with the cultivation years, and the difference of the root dry weight in the different years were more obvious with the increase of soil depth. The percentage of root biomass at the 0-20 cm soil layer to the total root biomass (0-60 cm) increased with the cultivation years. The root activity and SOD activity at the silking and milking stages decreased with the cultivation years. The POD activity of maize roots at the silking stage decreased with the cultivation years except for the 20-60 cm soil layer. The MDA contents of maize roots in different soil layers at the milking stage increased with the cultivation years, and the differences among the different cultivation years were more obvious with increasing the soil depth.

Key words: N-fixing tree species, enzyme activity, Chinese fir, PLFA

张玉芹1**,杨恒山1,范秀艳1,高聚林2. 苜蓿茬不同种植年限玉米根系生理特性及其产量[J]. 生态学杂志.

ZHANG Yu-qin1**, YANG Heng-shan1, FAN Xiu-yan1, GAO Ju-lin2. Root physiological characteristics and yield of maize with different cultivation durations in alfalfa stubble land.[J]. cje.

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