Abstract
The cropping patterns as drip irrigation under mulch were assumed in the experiment with peanut variety "Fu Hua 17" to study the effects of different topdressing on photosynthetic characteristics and yield for peanuts. Five different treatments were carried out to determine the photosynthetic characteristics, and a comprehensive evaluation was made in combination with the yields. The results showed that the diurnal changes for T1 (PK+Ca) and T2 (N+Ca) in the photosynthetic rate were lower than those in T3 (N+PK) and T4 (N+PK+Ca), a fact illustrating that N, P and K elements have a direct impact on peanut photosynthetic rate, chlorophyll SPAD value of the three treatments continued to decline at the beginning of flowering, which means that leaf chlorosis and fertilizer shortage appeared earlier for peanuts in the middle and late period. The sequence of yield was: T4 (N+PK+Ca) > T3 (N+PK) > T2 (N+Ca) > T1 (PK+Ca) > T5 (CK without topdressing). T4 yield was slightly higher than T3, a result showing with sufficient NPK, increasing Ca fertilizer could increase yield and efficiency. The studied results could offer theoretical basis for revealing the yield increasing mechanism of integrated management of water and fertilizer under mulched drip irrigation.
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Claims 4
Claim · model-written summary
T1 and T2 had lower diurnal photosynthetic rates than T3 and T4.
- Taxon
- Peanuts
Arachis hypogaeat0 - Treatment
- T1 (PK+Ca) and T2 (N+Ca)e0
- Outcome
- photosynthetic ratee0
- Direction
- lowere0
- Comparator
- T3 (N+PK) and T4 (N+PK+Ca)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the diurnal changes for T1 (PK+Ca) and T2 (N+Ca) in the photosynthetic rate were lower than those in T3 (N+PK) and T4 (N+PK+Ca)”
t0“Peanuts”
Claim · model-written summary
Leaf chlorophyll SPAD values declined at the beginning of flowering in three treatments.
- Taxon
- PeanutsArachis hypogaeat0
- Organ / stage
- beginning of floweringe0
- Outcome
- chlorophyll SPAD valuee0
- Direction
- declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll SPAD value of the three treatments continued to decline at the beginning of flowering”
t0“Peanuts”
Claim · model-written summary
Peanut yield ranked T4 above T3, T2, T1 and T5.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- T4 (N+PK+Ca)e0
- Outcome
- yielde0
- Comparator
- T3 (N+PK)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sequence of yield was: T4 (N+PK+Ca) > T3 (N+PK) > T2 (N+Ca) > T1 (PK+Ca) > T5 (CK without topdressing).”
t0“Peanuts”
Claim · model-written summary
Adding Ca with sufficient NPK slightly increased peanut yield versus NPK alone.
- Taxon
- PeanutsArachis hypogaeat0
- Treatment
- increasing Ca fertilizere0
- Outcome
- yielde0
- Direction
- slightly highere0
- Comparator
- T3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T4 yield was slightly higher than T3, a result showing with sufficient NPK, increasing Ca fertilizer could increase yield and efficiency.”
t0“Peanuts”
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