Abstract
An analysis was made on the 16-year experimental data from the long term fertilization experiment of maize on a yellow soil in Guizhou of Southwest China.Four treatments,i.e.,no fertilization(CK),chemical fertilization(165 kg N · hm-2,82.5 kg P 2 O 5 ·hm-2,and 82.5 kg K 2 O·hm-2,NPK),organic manure(30555 kg·hm-2,M),and combined application of chemical fertilizers and organic manure(NPKM),were selected to analyze the variation trends of maize yield and fertilizer use efficiency on yellow soil under effects of different long term fertilization modes,aimed to provide references for evaluating and establishing long term fertilization mode and promote the sustainable development of crop production.Overall,the maize yield under long term fertilization had an increasing trend,with a large annual variation.Treatment NPKM had the best yield-increasing effect,with the maize yield increased by 4075.71 kg·hm-2and the increment being up to 139.2%.Long term fertilization increased the fertilizer utilization efficiency of maize.In treatment M,the nitrogen and phosphorus utilization rates were increased significantly by 35.4% and 18.8%,respectively.Treatment NPK had obvious effect in improving potassium utilization rate,with an increment of 20% and being far higher than that in treatments M(8.7%) and NPKM(9.2%).The results showed that long term fertilization,especially the combined application of chemical fertilizers and organic manure,was of great importance in increasing crop yield and fertilizer use efficiency.
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Claims 6
Claim · model-written summary
Maize yield under long term fertilization increased overall with large annual variation.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maize yield under long term fertilization had an increasing trend,with a large annual variation”
Claim · model-written summary
NPKM increased maize yield by 4075.71 kg·hm-2, or 139.2%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment NPKM had the best yield-increasing effect,with the maize yield increased by 4075.71 kg·hm-2and the increment being up to 139.2%”
Claim · model-written summary
Long term fertilization increased maize fertilizer utilization efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Long term fertilization increased the fertilizer utilization efficiency of maize”
Claim · model-written summary
Manure treatment increased nitrogen utilization by 35.4%.
- Treatment
- treatment Me0
- Outcome
- nitrogen and phosphorus utilization ratese0
- Direction
- increasede0
- Value
- 35.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In treatment M,the nitrogen and phosphorus utilization rates were increased significantly by 35.4% and 18.8%,respectively”
t0“maize”
Claim · model-written summary
Manure treatment increased phosphorus utilization by 18.8%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In treatment M,the nitrogen and phosphorus utilization rates were increased significantly by 35.4% and 18.8%,respectively”
t0“maize”
Claim · model-written summary
NPK increased potassium utilization by 20%, above manure at 8.7% and NPKM at 9.2%.
- Treatment
- NPKe0
- Outcome
- potassium utilization ratee0
- Direction
- improvinge0
- Value
- 20%e0
- Qualifier
- M(8.7%) and NPKM(9.2%)e0
- Comparator
- treatments Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment NPK had obvious effect in improving potassium utilization rate,with an increment of 20% and being far higher than that in treatments M(8.7%) and NPKM(9.2%)”
t0“maize”
The same questions in other papers
fertilization · nutrient: efficiency · Zea mays (maize)Results differ
173 papers in the same direction as this paper · 12 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- negative
185 papers more in this group
See all 189 papers →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.