Table 1 Effects of planting density on maize yield response and P-use efficiency in the experimental plot during four consecutive cropping years.

From: Arbuscular mycorrhizal enhancement of phosphorus uptake and yields of maize under high planting density in the black soil region of China

Year

2011

2012

2013

2014

PD

50 K

90 K

50 K

90 K

50 K

90 K

50 K

90 K

Yield

\(10.4\pm 0.6\)

\(12.9*\pm 0.3\)

\(11.3 \pm 1.2\)

\(14.1* \pm 1.9\)

\(14.4 \pm 2.6\)

\(13.4\pm 2.2\)

\(10.1 \pm 0.2\)

\(11.8*\pm 0.0\)

PFPP

\(214.9 \pm 12.4\)

\(266.5 \pm 6.2\)

\(233.5\pm 24.8\)

\(291.3\pm 39.3\)

\(297.5\pm 53.7\)

\(276.9\pm 45.4\)

\(208.7\pm 4.1\)

\(243.8 \pm 0.7\)

  1. PD, Plant density; 90 K, at a planting density of 90,000 plants ha−1; 50 K, at a planting density of 50,000 plants ha−1; Yield, crop yield, t ha−1; PFPP, the partial factor productivity from applied P, kg yield per kg fertilizer, kg kg−1; all data presented are mean values (± SD); asterisk indicates significant difference (P \(\le\) 0.05) between different planting densities.
Back to article page