Abstract
Two similar field experiments were carried out at Kushkak and Fars Agricultural Experimental Staties to determine the effects of plant densities and nitrogen topdressing (NT) rates on forage yield, some agronomic traits, protein and prussic acid contents of forage sorghum ( Sorghum bicolor L. Moench var. Sudenense). Both experiments were conducted as spilt plots arranged in randomized complete block design with four replications. Plant density consisted of 25, 33 and 50 plants m -2 in the main plots and nitrogen topdressing rates were 0, 100, 200 and 300 kg N ha -1 as urea in the sub-plots. Increasing plant density increased main stem height (MSH), leaf area index (LAI), total tiller number m -2 (TTN), total fresh forage (TFF), total dry matter (TDM), leaf dry matter (LDM), and stem dry matter (SDM) yields. However, it decreased crude protein percentages (CPP) and had no effects on leaf-stem ratio at both locations. Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio. Optimum plant densities and NT rates for these experiments were 50 plants m -2 and 200 kg N ha -1 , respectively at both locations. Nitrogen applications had more effects on the second than the first out. The reaction of forage yields and most agronomic traits to the treatments were extremely similar at both locations.
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Claims 14
Claim · model-written summary
Higher density increased stem height, leaf area and tiller number.
- Treatment
- Increasing plant densitye0
- Outcome
- main stem height (MSH), leaf area index (LAI), total tiller number m -2 (TTN)e0
- Direction
- increasede0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density increased main stem height (MSH), leaf area index (LAI), total tiller number m -2 (TTN)”
t0“SORGHUM”
Claim · model-written summary
Higher density increased fresh forage, total dry matter and leaf dry matter yields.
- Treatment
- Increasing plant densitye0
- Outcome
- total fresh forage (TFF), total dry matter (TDM), leaf dry matter (LDM)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density increased main stem height (MSH), leaf area index (LAI), total tiller number m -2 (TTN), total fresh forage (TFF), total dry matter (TDM), leaf dry matter (LDM), and stem dry matter (SDM) yields”
t0“SORGHUM”
Claim · model-written summary
Higher density increased stem dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density increased main stem height (MSH), leaf area index (LAI), total tiller number m -2 (TTN), total fresh forage (TFF), total dry matter (TDM), leaf dry matter (LDM), and stem dry matter (SDM) yields”
t0“SORGHUM”
Claim · model-written summary
Higher density decreased crude protein percentage.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it decreased crude protein percentages (CPP)”
t0“SORGHUM”
Claim · model-written summary
Higher density had no effect on leaf-stem ratio at either location.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had no effects on leaf-stem ratio at both locations”
t0“SORGHUM”
Claim · model-written summary
Higher nitrogen rates increased height, leaf area and tiller number.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio”
t0“SORGHUM”
Claim · model-written summary
Higher nitrogen rates increased fresh forage and total dry matter.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio”
t0“SORGHUM”
Claim · model-written summary
Higher nitrogen rates increased crude protein percentage.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio”
t0“SORGHUM”
Claim · model-written summary
Higher nitrogen rates increased forage prussic acid percentage.
- Treatment
- Increasing nitrogen ratese0
- Outcome
- forage prussic acid percentage (FPAP)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio”
t0“SORGHUM”
Claim · model-written summary
Higher nitrogen rates decreased leaf-stem ratio.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing nitrogen rates increased MSH, LAI, TTN, TFF, TDM, CPP, forage prussic acid percentage (FPAP) and decreased leaf-stem ratio”
t0“SORGHUM”
Claim · model-written summary
Optimal density was 50 plants per square metre in both locations.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimum plant densities and NT rates for these experiments were 50 plants m -2 and 200 kg N ha -1 , respectively at both locations”
t0“SORGHUM”
Claim · model-written summary
Optimal nitrogen topdressing was 200 kg N per hectare in both locations.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimum plant densities and NT rates for these experiments were 50 plants m -2 and 200 kg N ha -1 , respectively at both locations”
t0“SORGHUM”
Claim · model-written summary
Nitrogen applications affected the second cut more than the first.
- Treatment
- Nitrogen applicationse0
- Outcome
- effects on the seconde0
- Direction
- moree0
- Comparator
- the first oute0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen applications had more effects on the second than the first out”
t0“SORGHUM”
Claim · model-written summary
Forage yield and agronomic trait responses were similar at both sites.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reaction of forage yields and most agronomic traits to the treatments were extremely similar at both locations”
t0“SORGHUM”
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See all 34 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.