Soil Amendment with Biomimetic Catalyst Under Wheat Trials

The action of the iron-porphyrin biomimetic catalyst, at the rate of 10 kg ha-1, was tested at TO and NA in soils cropped with wheat (Triticum aestivum L., cv. Blasco). In 10 m2 plots (three replications per site), aim2 soil surface was identified where iron-porphyrin was distributed before wheat emergence at the rate of 1 g m-2 (previously dissolved in 21 of water). All plots were plowed at 30 cm and wheat was fertilized at the rate of 130 kg N ha-1 with ammonium nitrate. Phosphorus and K fertilization (P2O5 = 100 kg ha-1; K2O = 200 kg ha-1) was the same on all plots. A detail of applied agronomic practices is reported in Table 3.7.

Plant samples were collected at harvest and oven dried (60°C) to measure yield and yield fractions. A sub-sample of dry biomass was analyzed (Kjeldhal method at NA and elemental analyzer at TO) to calculate N uptake by crops. At both sites a randomized complete block design with three replications was adopted. Field plots (2 x 5 = 10 m2) were 6 (2 treatments x 3 replications).

Table 3.7 Schedule (day/month) of wheat agronomic operations at the three sites

Torino

Napoli

Operations

14/3, 2006

4/11, 2005

P and K fertilization

26/10, 2006

8/11, 2006

22/10, 2007

6/11, 2007

16/3, 2006

4/11, 2005

Soil tillage

26/10, 2006

8/11, 2006

22/10, 2007

18/10, 2007

15/3, 2006

5/11, 2005

Seedbed preparation and wheat sowing

26/10, 2006

9/11, 2006

23/10, 2007

6/11, 2007

4/4, 2006

11/11, 2005

Fe-porphyrin treatments

15/11, 2006

1/12, 2006

9/11, 2007

21/11,2007

19/4, 5/5, 2006

14/2, 2006

N fertilization

2/3, 29/3, 2007

15/2, 2007

5/3, 24/4, 2008

22/2, 2008

24/7, 2006

26/6, 2006

Harvest

3/7, 2007

28/7, 2007

25/7, 2008

2/7, 2008

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