Abstract
Film mulching is a very common technique in agriculture worldwide, but few studies have focused on the dry matter (DM) and N accumulation of mulched crops. Understanding the grain yield (GY) associated with DM and N accumulation is essential for improving crop production. We conducted a 3‐yr field experiment with six N fertilizer rates (0, 100, 200, 250, 300, and 400 kg ha −1 ) in the semiarid climate of northwest China to determine the GY and DM and N accumulation of film‐mulched maize ( Zea mays L.). The results showed that relatively high GYs (13.1–15.1 Mg ha −1 ) were obtained using N fertilizer rates of 200 to 400 kg ha −1 in the 3 yr despite large year‐to‐year differences in rainfall. When the N rate was below 250 kg ha −1 , the GY, DM, and N accumulation increased significantly as the N fertilizer rate increased. A linear‐plateau model best described the relationship between the GY and the DM and N accumulation during the pre‐silking stage and a linear model the relationship during the post‐silking stage. We conclude that optimizing N management to improve DM and N accumulation (especially post‐silking) is the key to ensuring a high yield of film‐mulched maize.
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Claims 7
Claim · model-written summary
Nitrogen rates of 200 to 400 kg ha −1 produced relatively high maize grain yields of 13.1–15.1 Mg ha −1.
- Treatment
- N fertilizer rates of 200 to 400 kg ha −1e0
- Outcome
- GYse0
- Direction
- relatively highe0
- Value
- 13.1–15.1 Mg ha −1e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relatively high GYs (13.1–15.1 Mg ha −1 ) were obtained using N fertilizer rates of 200 to 400 kg ha −1”
t0“Maize”
Claim · model-written summary
Below 250 kg ha −1 nitrogen, maize grain yield increased significantly with fertilizer rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the N rate was below 250 kg ha −1 , the GY, DM, and N accumulation increased significantly as the N fertilizer rate increased”
t0“Maize”
Claim · model-written summary
Below 250 kg ha −1 nitrogen, maize dry matter accumulation increased significantly with fertilizer rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the N rate was below 250 kg ha −1 , the GY, DM, and N accumulation increased significantly as the N fertilizer rate increased”
t0“Maize”
Claim · model-written summary
Below 250 kg ha −1 nitrogen, maize nitrogen accumulation increased significantly with fertilizer rate.
- Treatment
- N fertilizer ratee0
- Outcome
- N accumulatione0
- Direction
- increasede0
- Qualifier
- below 250 kg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the N rate was below 250 kg ha −1 , the GY, DM, and N accumulation increased significantly as the N fertilizer rate increased”
t0“Maize”
Claim · model-written summary
A linear-plateau model best described the pre-silking relation between grain yield and dry matter and nitrogen accumulation.
- Organ / stage
- pre‐silking stagee0
- Outcome
- relationship between the GY and the DM and N accumulatione0
- Comparator
- linear‐plateau modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A linear‐plateau model best described the relationship between the GY and the DM and N accumulation during the pre‐silking stage”
t0“Maize”
Claim · model-written summary
A linear model described the post-silking relation between grain yield and dry matter and nitrogen accumulation.
- Organ / stage
- post‐silking stagee0
- Outcome
- relationship between the GY and the DM and N accumulatione1
- Comparator
- linear modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a linear model the relationship during the post‐silking stage”
e1“relationship between the GY and the DM and N accumulation”
t0“Maize”
Claim · model-written summary
The authors recommend optimizing nitrogen management to improve dry matter and nitrogen accumulation, especially after silking, to ensure high film-mulched maize yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimizing N management to improve DM and N accumulation (especially post‐silking) is the key to ensuring a high yield of film‐mulched maize”
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