Abstract
The Zinc deficiency is a worldwide nutritional constraint for crop production in many types of soil, particularly in cereals growing in calcareous soil.Two field trials were conducted to study the effects of zinc fertilizer doses and application method on photosynthetic characteristics and grain yield of summer maize, from June to September of 2013, in Xun County (34°40′12″N, 114°32′24″E) and Yuzhou County (33°59′19″N, 113°33′47″E).Optimal Zn fertilizer application (30 kg ZnSO 4 •7H 2 O hm -2 ) increased chlorophyll content in leaves, improved photosynthesis, and increased grain yield of summer maize.At 15 kg ZnSO 4 •7H 2 O hm -2 , grain yield was higher in Xun County and lower in Yuzhou County when the entire amount was applied as basal fertilization as opposed to being split between the basal and foliar fertilization.The opposite result (grain yield lower in Xun County than in Yuzhou County) was obtained at 30 kg ZnSO 4 •7H 2 O hm -2 .These results have important implications for guiding the rational application of Zn fertilizer and improving the grain yield of summer maize in Henan province.
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Claims 5
Claim · model-written summary
Optimal zinc fertilizer increased leaf chlorophyll and photosynthesis.
- Treatment
- 30 kg ZnSO 4 •7H 2 O hm -2e0
- Outcome
- chlorophyll content in leaves, improved photosynthesise0
- Direction
- increasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimal Zn fertilizer application (30 kg ZnSO 4 •7H 2 O hm -2 ) increased chlorophyll content in leaves, improved photosynthesis, and increased grain yield of summer maize.”
Claim · model-written summary
Optimal zinc fertilizer increased summer maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimal Zn fertilizer application (30 kg ZnSO 4 •7H 2 O hm -2 ) increased chlorophyll content in leaves, improved photosynthesis, and increased grain yield of summer maize.”
Claim · model-written summary
At the lower zinc dose, basal application raised yield relative to split application in Xun County.
- Treatment
- 15 kg ZnSO 4 •7H 2 O hm -2e0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- split between the basal and foliar fertilizatione0
- Setting
- Xun Countye0
Not reportedTaxon
Verbatim
e0“At 15 kg ZnSO 4 •7H 2 O hm -2 , grain yield was higher in Xun County and lower in Yuzhou County when the entire amount was applied as basal fertilization as opposed to being split between the basal and foliar fertilization.”
Claim · model-written summary
At the lower zinc dose, basal application lowered yield relative to split application in Yuzhou County.
- Treatment
- 15 kg ZnSO 4 •7H 2 O hm -2e0
- Outcome
- grain yielde0
- Direction
- lowere0
- Comparator
- split between the basal and foliar fertilizatione0
- Setting
- Yuzhou Countye0
Not reportedTaxon
Verbatim
e0“At 15 kg ZnSO 4 •7H 2 O hm -2 , grain yield was higher in Xun County and lower in Yuzhou County when the entire amount was applied as basal fertilization as opposed to being split between the basal and foliar fertilization.”
Claim · model-written summary
At the higher zinc dose, grain yield was lower in Xun County than Yuzhou County.
- Treatment
- 30 kg ZnSO 4 •7H 2 O hm -2e0
- Outcome
- grain yielde0
- Direction
- lowere0
- Comparator
- Yuzhou Countye0
- Setting
- Xun Countye0
Not reportedTaxon
Verbatim
e0“The opposite result (grain yield lower in Xun County than in Yuzhou County) was obtained at 30 kg ZnSO 4 •7H 2 O hm -2 .”
The same questions in other papers
zinc sulfate · yield · Zea mays (maize)Results differ
123 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
124 papers more in this group
See all 128 papers →zinc sulfate · physiology: photosynthesis · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.