Sward lifting in compacted grassland: Contrasting effects on two different soils · Knowledge Library

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Sward lifting in compacted grassland: Contrasting effects on two different soils · Knowledge Library

herbage nitrogen uptake

↑ 2↓ 2= 26

increase
sward lifting vs. untreated controlsignificant · 2016annual;2017firstgrowthperiod · Site 1, the sandy loam · Sandyloam,2016total p=.04 and2017spring p=.01; annual2016 preferred over individualcuts1/3/5. Rounded2016cut1 p=.00 not stored as exactzero.
Numbers
- treatment 478 vs. control 438 kg N/ha (+9.132 %) · 2016total
- treatment 112 vs. control 99 kg N/ha (+13.13 %) · 2017cut1
Source · p. 5
“On the sandy loam, sward lifting increased N uptake in the first growth period of all three growing seasons when compared to the controls, and the difference was significant in the first two growing seasons”
Source · p. 5
“sward lifting also significantly increased N uptake in the third and fifth growth period, and”
no effect
sward lifting vs. untreated controlnot significant · 2017annual;2018firstgrowthperiod · Site 1, the sandy loam · Sandyloam annual2017 p=.21 andspring2018 p=.26; absence qualifies abstract springincrease claim
Numbers
- treatment 490 vs. control 466 kg N/ha (+5.15 %) · 2017total
- treatment 105 vs. control 93 kg N/ha (+12.9 %) · 2018cut1
Source · p. 5
“neither was the cumulative N uptake of that season.”
Source · p. 6
“2018 1 93 105 0.26”
increase
sward lifting vs. untreated controlp = 0.05 · 2016firstgrowthperiod · Site 2, the heavy clay · Spring2016 heavyclay
Numbers
- treatment 131 vs. control 117 kg N/ha (+11.97 %)
Source · p. 5
“On the heavy clay, sward lifting significantly increased N uptake in the first growth period of the first growing season after treatment”
decrease
sward lifting vs. untreated controlsignificant · 2016cut5;2018cut1 · Site 2, the heavy clay · Heavyclay late2016 andspring2018; exactp=.02/.04
Numbers
- treatment 28 vs. control 32 kg N/ha (-12.5 %) · 2016cut5
- treatment 121 vs. control 143 kg N/ha (-15.38 %) · 2018cut1
Source · p. 5
“but decreased N uptake in the fifth growth period of that season”
Source · p. 6
“2018 1 93 105 0.26 143 **121** 0.04”
no effect
sward lifting vs. untreated controlp = 0.96 · 2016entireseason · Site 2, the heavy clay · Annual N uptake heavyclay
Numbers
- treatment 382 vs. control 381 kg N/ha (+0.2625 %)
Source · p. 6
“Cumulative N uptake in either of the two full growing seasons was not influenced by sward lifting.”
decrease
sward lifting vs. untreated controlp = 0.1 · 2017entireseason · Site 2, the heavy clay · Annual N uptake heavyclay; reported tendency tolower uptake, p=.10 not significant
Numbers
- treatment 397 vs. control 419 kg N/ha (-5.251 %)
Source · p. 7
“The tendency to a lower herbage yield and N uptake afterwards may have been caused by the relatively large decrease in soil N fertility due to sward lifting.”
Source · p. 6
“Total 466 490 0.21 419 397 0.10”

Sites

Site 1, the sandy loam

Location: Northern part of the Netherlands53.23° N, 5.71° E
Land use: permanent grasslandPastures and managed grassland
Management on the whole site: artificially drainedDrainage, cutting for silageMowing, N fertilizerNitrogen fertilizer

Soil layers
Depth	Texture	Clay	pH	Organic C	Bulk density
0–30 cm	marine sandy loam	11 %	6.4	–	–

Site 2, the heavy clay

Location: Northern part of the Netherlands53.17° N, 5.76° E
Land use: permanent grasslandPastures and managed grassland
Management on the whole site: artificially drainedDrainage, cutting for summer feedingMowing, N fertilizerNitrogen fertilizer

Soil layers
Depth	Texture	Clay