Crops ›› 2019, Vol. 35 ›› Issue (3): 137-141.doi: 10.16035/j.issn.1001-7283.2019.03.022

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Effects of Nitrogen on Agronomic Traits and Nitrogen Use Efficiency of Mung Bean Cultivar Wankelü 3

Ye Weijun,Yang Yong,Zhang Liya,Tian Dongfeng,Zhang Lingling,Zhou Bin   

  1. Crop Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, Anhui, China
  • Received:2019-01-23 Revised:2019-04-10 Online:2019-06-15 Published:2019-06-12
  • Contact: Bin Zhou

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Abstract:

In order to study the effects of nitrogen application levels on yield of mung bean cultivar Wankelü 3, 4 nitrogen levels (0, 30, 60, 90kg/hm 2) were designed to analyze the effects of nitrogen levels on shoot dry matter accumulation, chlorophyll content, pods per plant, yield and other traits. The experimental results showed that shoot dry matter accumulation and chlorophyll content improved with the increased nitrogen application. Increasing nitrogen level could maintain plant chlorophyll content at a high level, especially at seedling and flowering stage. The number, fresh weight and dry weight of nodule showed a tendency of first increased and then decreased with the increasing of nitrogen application level. Plant height and the number of branches increased with the increasing of nitrogen application level. The effects of nitrogen level on pods per plants, yield, and agronomic efficiency of applied nitrogen were similar, these three traits showed initial increases and then decreased with the increasing of nitrogen level, the maximum values appeared at the treatment of 60kg/hm 2 nitrogen. This also indicated that the yield was influenced by the nitrogen fertilizer mainly affected by the pods per plant. The partial factor productivity of applied nitrogen decreased significantly with the increasing of nitrogen application. This study showed that moderate application amount of nitrogen fertilizer could increase the yield potential of mung bean, and the suitable amount of nitrogen application for Wankelü 3 was 60kg/hm 2 in Anhui Province.

Key words: Mung bean, Nodule, Nitrogen, Yield

Fig.1

The effects of different nitrogen application on shoot dry matter accumulation Different lowercase letters indicate significant difference at 0.05 level between treatments, the same below"

Fig.2

Dynamics change of chlorophyll content under different nitrogen application"

Fig.3

The effects of different nitrogen application on mung bean nodulation"

Table 1

The effects of different nitrogen levels on agronomic traits and nitrogen use efficiency"

处理
Treatment		 播种至开花
时的天数(d)
FD		 生育期
(d)
GP		 株高
(cm)
PH		 单株
分枝数
BP		 单株
荚数
PP		 单荚
粒数
SP		 百粒重
(g)
HSW		 产量
(kg/hm2)
Yield		 氮肥农学利
用率(kg/kg)
AEN		 氮肥偏生
产力(kg/kg)
PFPN
N0 41.5a 62.0a 56.8c 1.8b 21.8b 10.2a 6.2a 2 168.9b - -
N1 42.0a 63.0a 61.0b 2.0b 25.2a 10.5a 6.2a 2 335.4ab 5.3b 77.9a
N2 42.0a 63.3a 61.5b 2.2ab 26.9a 10.3a 6.3a 2 402.0a 7.6a 40.0b
N3 42.3a 64.0a 64.7a 2.6a 24.2ab 10.6a 6.3a 2 233.3b 1.9c 24.8c
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