Resource Use Efficiencies of C3 and C4 Cereals under Split Nitrogen Regimes

Agronomy

MuhammadArif Ali¹  Muhammad Nadeem¹  Shakeel Ahmad¹  ShahzadUsman Khan¹  Ghulam Abbas¹  Umair Farooq¹  Muhammad Ismail¹  Qaiser Abbas¹  Amna Khan¹  Shahrish Naz¹  MuhammadImran Shahzad¹  Kashif Javed¹  Zartash Fatima¹  Sajjad Hussain¹  Haseeb Younis¹  MuhammadAzam Khan²  AzharAli Khan³  Mukhtar Ahmed⁴ 

[1] Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan 60800, Pakistan;In-service Agriculture Training Institute, Sargodha 40100, Pakistan;PARC, Research and Training Station, Bahauddin Zakariya University, Multan 60800, Pakistan;PMAS, Arid Agriculture University, Rawalpindi 46300, Pakistan;

关键词: barley;    maize;    millet;    oat;    radiation use efficiency;    sorghum;    wheat;   

DOI  :  10.3390/agronomy8050069

来源: DOAJ

【 摘 要 】

Resources are limited, thus improving resource use efficiency is a key objective for cereal-based cropping systems. This field study was carried out to quantify resource use efficiencies in selected C3 and C4 cereals under split nitrogen (N) application regimes. The study included the following treatments: six cereals (three C3: wheat, oat, and barley; and three C4: maize, millet, and sorghum) and four split N application regimes (NS1 = full amount of N at sowing; NS2 = half N at sowing + half N at first irrigation; NS3 = ⅓ N at sowing + ⅓ N at first irrigation + ⅓ N at second irrigation; NS4 = ¼ N at sowing + ¼ N at first irrigation + ¼ N at second irrigation + ¼ N at third irrigation). Results revealed that C4 cereals out-yielded C3 cereals in terms of biomass production, grain yield, and resource use efficiencies (i.e., radiation use efficiency (RUE) and nitrogen use efficiency (NUE)), while splitting N into three applications proved to be a better strategy for all of the selected winter and summer cereals. The results suggest that C4 cereals should be added into existing cereal-based cropping systems and N application done in three installments to boost productivity and higher resource use efficiency to ensure food security for the burgeoning population.

【 授权许可】

Unknown