Abstract
TWO FIELD experiments were carried out at the experimental farm of the Rice Research and Training Center, Sakha, Kafrelshiekh, Egypt, during 2009 and 2010 seasons, to study the response of hybrid rice (Egyptian Hybrid1) to methods (soil addition and foliar spray (S)) and time of potassium application. Eleven combinations were studied as follow applications times: (T1) without k fertilizer , (T2) 24+0+0, (T3) 8+8+8, (T4) 8+8+S, (T5) 12+12+S, (T6) 8+ S +S, (T7) 12+ S +S, (T8) 24+ S +S, (T9) 0+ S +0, (T10) 0+ 0 +S and (T11) 0+ S +S kg K2O/fed. (feddan = 0.42 hectare) at basal (B), med tillering (MT) and panicle initiation (PI) stages, respectively, as well as (11) without K fertilizer. The results revealed that basal application of K or foliar spray twice each at MT and PI stages resulted in a significant increase in plant height and dry matter accumulation (g.m-2) compared with control in both seasons. Soil or foliar application of K, separately or together, resulted in a significant increase in number of panicles m-2, panicle weight, panicle length, number of filled grains per panicle, 1000-grain weight, grain yield and nutrients uptake (N, P, K and Zn) in grains compared with control treatment in both seasons. Split application of 24 kg K2O/fed in three equal doses was found to better grain yield, yield attributes and nutrients uptake in grains than entire basal application or foliar spray at MT or PI stages alone. The integration of basal application and either top dressing or foliar K in MT and PI stages did not differ from splitting K in three equal doses in the most mentioned traits in both seasons. However, basal application of 24 kg K2O/fed alone or along with foliar spray at MT and PI produced the highest straw yield and nutrients uptake (N, P, K and Zn) in straw in the two seasons. There was no significant difference in straw yield among foliar application of potassium and control treatment. The treatment containing soil application of K twice at basal and MT stage, or entire basal application alone were insignificant with entire basal along with the foliar application of K at MT and PI stages in N, P, K and Zn uptake in straw in both seasons. The correlation among each of nutrient content and grain and straw yields were significantly positive. The present study concludes that splitting 24 kg K2O/fed in three equal doses, i.e. 8+8+8 or the combination of top dressing (kg K2O/fed) and foliar spray (S), 8+8+S, 12+S+S and 8+S+S at basal, MT, and PI stages are a viable nutrient management package for getting higher grain yield of hybrid rice (Egyptian Hybrid1) at Kafrelshiekh Governorate.
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Claims 10
Claim · model-written summary
Basal potassium or two foliar sprays increased rice height and dry matter relative to control in both seasons.
- Taxon
- Hybrid Rice
Oryza sativat0 - Treatment
- basal application of K or foliar spray twice each at MT and PI stagese0
- Outcome
- plant height and dry matter accumulatione0
- Direction
- increasee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“basal application of K or foliar spray twice each at MT and PI stages resulted in a significant increase in plant height and dry matter accumulation (g.m-2) compared with control in both seasons”
t0“Hybrid Rice”
Claim · model-written summary
Soil or foliar potassium increased panicle and grain yield traits over control in both seasons.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- Soil or foliar application of Ke0
- Outcome
- number of panicles m-2, panicle weight, panicle lengthe0
- Direction
- increasee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil or foliar application of K, separately or together, resulted in a significant increase in number of panicles m-2, panicle weight, panicle length, number of filled grains per panicle, 1000-grain weight, grain yield and nutrients uptake (N, P, K and Zn) in grains compared with control treatment in both seasons”
t0“Hybrid Rice”
Claim · model-written summary
Soil or foliar potassium increased filled grains, thousand grain weight and grain yield over control.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- Soil or foliar application of Ke1
- Outcome
- number of filled grains per panicle, 1000-grain weight, grain yielde0
- Direction
- increasee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increase in number of panicles m-2, panicle weight, panicle length, number of filled grains per panicle, 1000-grain weight, grain yield and nutrients uptake (N, P, K and Zn) in grains compared with control treatment”
e1“Soil or foliar application of K”
t0“Hybrid Rice”
Claim · model-written summary
Soil or foliar potassium increased N, P, K and Zn uptake in grains over control.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- Soil or foliar application of Ke1
- Outcome
- nutrients uptake (N, P, K and Zn) in grainse0
- Direction
- increasee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increase in number of panicles m-2, panicle weight, panicle length, number of filled grains per panicle, 1000-grain weight, grain yield and nutrients uptake (N, P, K and Zn) in grains compared with control treatment”
e1“Soil or foliar application of K”
t0“Hybrid Rice”
Claim · model-written summary
Three equal soil doses improved grain yield, yield attributes and grain nutrient uptake over entire basal application or a single foliar spray.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- Split application of 24 kg K2O/fed in three equal dosese0
- Outcome
- grain yield, yield attributes and nutrients uptake in grainse0
- Direction
- bettere0
- Comparator
- entire basal application or foliar spray at MT or PI stages alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Split application of 24 kg K2O/fed in three equal doses was found to better grain yield, yield attributes and nutrients uptake in grains than entire basal application or foliar spray at MT or PI stages alone”
t0“Hybrid Rice”
Claim · model-written summary
Basal application with top dressing or foliar potassium did not differ from three equal doses in most traits.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- integration of basal application and either top dressing or foliar K in MT and PI stagese0
- Outcome
- most mentioned traitse0
- Direction
- did not differe0
- Comparator
- splitting K in three equal dosese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The integration of basal application and either top dressing or foliar K in MT and PI stages did not differ from splitting K in three equal doses in the most mentioned traits in both seasons”
t0“Hybrid Rice”
Claim · model-written summary
Basal potassium alone or with foliar sprays produced the highest straw yield and straw nutrient uptake.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- basal application of 24 kg K2O/fed alone or along with foliar spray at MT and PIe0
- Outcome
- straw yield and nutrients uptake (N, P, K and Zn) in strawe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“basal application of 24 kg K2O/fed alone or along with foliar spray at MT and PI produced the highest straw yield and nutrients uptake (N, P, K and Zn) in straw in the two seasons”
t0“Hybrid Rice”
Claim · model-written summary
Foliar potassium and control did not differ significantly in straw yield.
- Taxon
- Hybrid RiceOryza sativat0
- Treatment
- foliar application of potassiume0
- Outcome
- straw yielde0
- Direction
- no significant differencee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference in straw yield among foliar application of potassium and control treatment”
t0“Hybrid Rice”
Claim · model-written summary
Grain and straw yields were positively correlated with nutrient content.
- Taxon
- Hybrid RiceOryza sativat0
- Compound
- nutrient contente0
- Outcome
- grain and straw yieldse0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The correlation among each of nutrient content and grain and straw yields were significantly positive”
t0“Hybrid Rice”
Claim · model-written summary
The authors recommend three equal potassium doses or specified soil and foliar combinations for higher rice grain yield.
- Taxon
- hybrid riceOryza sativae0
- Outcome
- viable nutrient management package for getting higher grain yielde0
- Setting
- Kafrelshiekh Governoratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“splitting 24 kg K2O/fed in three equal doses, i.e. 8+8+8 or the combination of top dressing (kg K2O/fed) and foliar spray (S), 8+8+S, 12+S+S and 8+S+S at basal, MT, and PI stages are a viable nutrient management package for getting higher grain yield of hybrid rice (Egyptian Hybrid1) at Kafrelshiekh Governorate”
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