Topic
Environmental-friendly agriculture
Volume
Volume 68 / No. 3 / 2022
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EFFECT OF CONTROLLED-RELEASE FERTILIZER ON MAIZE YIELD AND NUTRIENT UPTAKE UNDER A FERTILIZER ONE-TIME POINT-APPLIED SYSTEM
一次性机械化穴施缓释复合肥对玉米产量和养分吸收的影响
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Abstract
Currently, maize production in China suffers from many problems such as excessive fertilizer application, inefficient fertilizer use and insufficient agricultural labor. To explore the efficient fertilization pattern of maize for fertilizer decrease and yield increase by studying the effect of one-time mechanical point-applied fertilization of controlled-release compound fertilizer in the root-zone on yield and nutrient uptake. The selected fertilizer was a controlled-release granular fertilizer(24-6-10 for N-P2O5-K2O)with six treatments in the application program: 1) no fertilizer (CK); 2) a one-time banding fertilizer application (BDP) 5 cm off the seeds between rows and 10 cm deep; 3) one-time point-applied fertilization (RZF) 5 cm off seed in the row and 10 cm deep; 4) one-time point-applied fertilization (90% RZF) 10% fertilizer reduction 5 cm off seed in the row and 10 cm deep; 5) one-time point-applied fertilization (80% RZF) 20% fertilizer reduction 5 cm off seed in the row and 10 cm deep; 6) one-time point-applied fertilization (70% RZF) 30% fertilizer reduction 5 cm off seed in the row and 10 cm deep. The results showed that one-time mechanized point-applied fertilization of controlled-release compound fertilizer (RZF) in the root zone increased yield by 5.84% over one-time banding fertilizer application (BDP), and the difference was significant, indicating that mechanized point-applied fertilization of fertilizer can replace manual point-applied fertilization application operations and achieve increased crop yield. Fertilizer agronomic utilization rate of 12.35% and bias productivity of 5.31% were higher in RZF than in BDP, and the differences were significant, indicating that one-time mechanical point-applied fertilization in the root zone significantly improved fertilizer utilization and reduced fertilizer loss.
Abstract in Chinese