Abstract
Information about optimum soil water content for efficient use of nutrients is essential for higher crop yield. A pot experiment was conducted from 1996 to 1998 to assess the effect of soil water potential and NPK fertilizer rates on yield and nutrient uptake of wheat. Four water potential ranges (0 to 33, 33 to 100, 33 to 500, 33 to 1000 kPa) along with three fertilizers rates (0-0-0, 37-25-25, 75-50-50 mg of NPK kg'1) were investigated in factorial arrangements. Soil water content at prefixed water potential was determined from soil moisture characteristic curve. When soil water content decreased beyond the lower limit of prefixed soil water potential treatment, the required amount of water was added to raise the soil water content at 33 kPa of each treatment, except 0 to 33 kPa treatment, which fluctuated between 33 to WOO kPa. The increase in soil water potential from 33 to 500 kPa significantly decreased grain and straw yields and uptakes of N, P and K. Conversely, increase in fertilizer rate application increased the yields of grain and straw and uptake ofN, P and K. The data suggested that optimum wheat yield could be obtained at lower soil water potential level, and balanced fertilizer application can compensate the losses due to the moisture stress to some extent.
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Claims 5
Claim · model-written summary
Increasing soil water potential from 33 to 500 kPa decreased wheat grain and straw yields.
- Taxon
- WHEAT
Triticum aestivumt0 - Treatment
- soil water potential from 33 to 500 kPae0
- Outcome
- grain and straw yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in soil water potential from 33 to 500 kPa significantly decreased grain and straw yields and uptakes of N, P and K”
t0“WHEAT”
Claim · model-written summary
Increasing soil water potential from 33 to 500 kPa decreased N, P and K uptake.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- soil water potential from 33 to 500 kPae0
- Outcome
- uptakes of N, P and Ke0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in soil water potential from 33 to 500 kPa significantly decreased grain and straw yields and uptakes of N, P and K”
t0“WHEAT”
Claim · model-written summary
Higher fertilizer rates increased grain and straw yields.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- fertilizer rate applicatione0
- Outcome
- yields of grain and strawe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in fertilizer rate application increased the yields of grain and straw and uptake ofN, P and K”
t0“WHEAT”
Claim · model-written summary
Higher fertilizer rates increased N, P and K uptake.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- fertilizer rate applicatione0
- Outcome
- uptake ofN, P and Ke0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in fertilizer rate application increased the yields of grain and straw and uptake ofN, P and K”
t0“WHEAT”
Claim · model-written summary
The authors suggest optimum wheat yield at lower soil water potential and balanced fertilizer to partly compensate moisture stress losses.
- Taxon
- wheatTriticum aestivume0
- Outcome
- optimum wheat yield could be obtained at lower soil water potential level, and balanced fertilizer application can compensate the lossese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum wheat yield could be obtained at lower soil water potential level, and balanced fertilizer application can compensate the losses due to the moisture stress to some extent”
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