[Objective] In order to research differences of economic benefits among 5planting patterns of sweet corn. [Method] Planting benefit of five kinds of planting patterns of Ditian6 were studied. They were one cropping of...[Objective] In order to research differences of economic benefits among 5planting patterns of sweet corn. [Method] Planting benefit of five kinds of planting patterns of Ditian6 were studied. They were one cropping of sweet corn per year,two cropping of sweet corn per year, multiple sowing of wheat and sweet corn, intercropping of sweet corn and vegetables(potatoes, peppers). [Result] Planting benefit of two cropping of sweet corn in a year, multiple sowing of wheat and sweet,intercropping of sweet corn and vegetables(potatoes, peppers) were higher than that of sweet corn monoculture. The benefit of two cropping of sweet corn per year was the highest, which was 93 937.5 yuan/hm^2. The pure income increase was 41 610 yuan if the average investment of 18 480 yuan/hm^2 was eliminated. Compared with wheat monoculture, the benefit of multiple sowing of wheat and sweet increased39 060 yuan/hm^2. The pure income increase was 25 500 yuan if the average investment of 13 560 yuan/hm^2 was eliminated. The planting benefit of intercropping of sweet corn and potato was 71 460 yuan, and that of intercropping of sweet corn and pepper was 63 750 yuan. [Conclusion] There were extremely significant differences among the economic benefits of 5 planting patterns of sweet corn. According to local actual situation, farmers can choose the most suitable pattern to improve the planting efficiency of the sweet corn.展开更多
[Objective] The aim was to explore application and popularization of Huaimai No.29. [Method] The characteristics, yields, quality, application range and use of Huaimai No.29 were introduced and the cultivation technol...[Objective] The aim was to explore application and popularization of Huaimai No.29. [Method] The characteristics, yields, quality, application range and use of Huaimai No.29 were introduced and the cultivation technology was concluded. [Result] Huaimai No.29 is cultivated with Huaimai No.20 as a female parent and Mianyang No.04254 as a male parent, it is a semi-winter variety, and matures later, with yield of 7.5-9.0 t/hm2. The variety is suitable to be grown in Henan Province, northern areas of Anhui Province and Jiangsu Province, the central Shaanxi plain, and Heze, Shandong Province. The ears are spindle-shaped and seeds grow quite well. The thousand-seed weight is in the range of 40-42 g, and it is suitable to be sown in early or middle October in Huaibei and late October in the area along Huaihe River. The basic seedlings maintain in the range of 1.80-2.70 million per hm2. [Conclusion] Huaimai No.29 is of high yield and high tolerance against coldness. The comprehensive characters performed good. The variety was approved by our country in 2009 and numbered as nation-approved wheat No.2009010. It has been proved that the variety can be planted in Huaibei areas or the areas along Huai River.展开更多
A sand-based culture system using rock phosphate (P) was developed to simulate the situation in alkalinesoils, with respect to the dominant P form, and five wheat cultivars (Excalibur, Brookton, Krichauff, Westoniaand...A sand-based culture system using rock phosphate (P) was developed to simulate the situation in alkalinesoils, with respect to the dominant P form, and five wheat cultivars (Excalibur, Brookton, Krichauff, Westoniaand Sunco) were tested in this screening system to compare their P uptake and utilisation efficiencies. Resultsshowed that these cultivars differed significantly in their ability to acquire P from the sparingly available form(rock phosphate in this case). The accumulation of P by Brookton was three times that by Krichauff. Pconcentrations in plant tissues did not differ significantly, indicating that all cultivars were similar in Putilisation efficiency. A further experiment showed that the greater ability of a cultivar to take up P fromsparingly available form was related to the ability of a cultivar to acidify the rhizosphere. Seed P content wasa confounding factor in this system, and the use of relatively uniform seed with similar P content, preferablylow, was conducive to a successful outcome of the screening process.展开更多
Ammonia volatilization losses from urea applied as a basal fertilizer and a top dressing at tillering stage in a wheat field of Taihu Region, China, were measured with a micrometeorological technique. Urea as fertiliz...Ammonia volatilization losses from urea applied as a basal fertilizer and a top dressing at tillering stage in a wheat field of Taihu Region, China, were measured with a micrometeorological technique. Urea as fertilizer was surface broadcast at 81 (low N) and 135 (high N) kg N ha-1 as basal at the 3-leaf stage of the wheat seedling on December 2002, and 54 (low N) and 90 (high N) kg N ha-1 as top dressing on February 2003. Ammonia volatilization losses occurred mainly in the first week after applying N fert…展开更多
Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown o...Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown on a high pH Chinese silt loam (52.7 mg NaHCO3-Pi kg-1) and a Danish sandy loam (43.4mg NaHCO3-Pi kg-1) were studied to assess how these wheat cultivars differed in phoephorus uptake.The rhizosphere soil pH of two wheat cultivars grown on the two soils were fairly unchanged with increasing distance from the root surface. However the root hairs of Shichun were 2.1 times longer than those of Sleipner. Root surface area (RSA) of Shichun increased by 192% due to root hairs whereas root hairs of Sleipner increased RSA by 68% only. Hence the root system of Shichun was in contact with more soil than that of Sleipner, even though Sleipner had a longer root. Grown at the lower pH and level of NaHCO3-Pi in the Danish soil Shichun absorbed more inorganic phosphorus than Sleipner whereas at the higher pH and level of NaHCO3-Pi in the Chinese soil there was no phosphorus uptake difference between the two wheat cultivars.展开更多
The genetic variation of Italian ryegrass (Lolium multiflorum Lain.) and westerwolds ryegrass (L. westerwoldicum Breakw.) was investigated in eight tetraploid cultivars originated from Poland. The 337 individual s...The genetic variation of Italian ryegrass (Lolium multiflorum Lain.) and westerwolds ryegrass (L. westerwoldicum Breakw.) was investigated in eight tetraploid cultivars originated from Poland. The 337 individual seedlings, cultivated in uniform greenhouse conditions, were tested with horizontal gel electrophoresis according to five enzyme systems: diaforase (DIA), superoxide dismutase (SOD), glutamate oxalacetate transaminase (GOT), peroxidise (PX) and phosphogluco isomerise (PGI), which were used to array allelic diversity at five polymorphic loci. The estimation of genetic diversity in 64 plants of the same cultivars was studied using inter simple sequence repeats (ISSRs) as molecular marker. The genetic variation described by ISSR suggests that the polymorphism detected appears to be poorly informative at the taxonomic level. For statistical analysis, unweighted pair group method with arithmetic mean (UPGMA) based dendrograms and minimum spanning trees were constructed using Nei's distance and Jaccard' s similarity coefficient.展开更多
基金Supported by Demonstration Project of Shanxi Science and Technology Bureau"Three-dimensional and Efficient Planting Pattern Demonstration of Sweet Corn in Basin of Central Shanxi"(No.2012.49)~~
文摘[Objective] In order to research differences of economic benefits among 5planting patterns of sweet corn. [Method] Planting benefit of five kinds of planting patterns of Ditian6 were studied. They were one cropping of sweet corn per year,two cropping of sweet corn per year, multiple sowing of wheat and sweet corn, intercropping of sweet corn and vegetables(potatoes, peppers). [Result] Planting benefit of two cropping of sweet corn in a year, multiple sowing of wheat and sweet,intercropping of sweet corn and vegetables(potatoes, peppers) were higher than that of sweet corn monoculture. The benefit of two cropping of sweet corn per year was the highest, which was 93 937.5 yuan/hm^2. The pure income increase was 41 610 yuan if the average investment of 18 480 yuan/hm^2 was eliminated. Compared with wheat monoculture, the benefit of multiple sowing of wheat and sweet increased39 060 yuan/hm^2. The pure income increase was 25 500 yuan if the average investment of 13 560 yuan/hm^2 was eliminated. The planting benefit of intercropping of sweet corn and potato was 71 460 yuan, and that of intercropping of sweet corn and pepper was 63 750 yuan. [Conclusion] There were extremely significant differences among the economic benefits of 5 planting patterns of sweet corn. According to local actual situation, farmers can choose the most suitable pattern to improve the planting efficiency of the sweet corn.
文摘[Objective] The aim was to explore application and popularization of Huaimai No.29. [Method] The characteristics, yields, quality, application range and use of Huaimai No.29 were introduced and the cultivation technology was concluded. [Result] Huaimai No.29 is cultivated with Huaimai No.20 as a female parent and Mianyang No.04254 as a male parent, it is a semi-winter variety, and matures later, with yield of 7.5-9.0 t/hm2. The variety is suitable to be grown in Henan Province, northern areas of Anhui Province and Jiangsu Province, the central Shaanxi plain, and Heze, Shandong Province. The ears are spindle-shaped and seeds grow quite well. The thousand-seed weight is in the range of 40-42 g, and it is suitable to be sown in early or middle October in Huaibei and late October in the area along Huaihe River. The basic seedlings maintain in the range of 1.80-2.70 million per hm2. [Conclusion] Huaimai No.29 is of high yield and high tolerance against coldness. The comprehensive characters performed good. The variety was approved by our country in 2009 and numbered as nation-approved wheat No.2009010. It has been proved that the variety can be planted in Huaibei areas or the areas along Huai River.
基金Project supported by the CRC for Molecular Plant Breeding, Australia.
文摘A sand-based culture system using rock phosphate (P) was developed to simulate the situation in alkalinesoils, with respect to the dominant P form, and five wheat cultivars (Excalibur, Brookton, Krichauff, Westoniaand Sunco) were tested in this screening system to compare their P uptake and utilisation efficiencies. Resultsshowed that these cultivars differed significantly in their ability to acquire P from the sparingly available form(rock phosphate in this case). The accumulation of P by Brookton was three times that by Krichauff. Pconcentrations in plant tissues did not differ significantly, indicating that all cultivars were similar in Putilisation efficiency. A further experiment showed that the greater ability of a cultivar to take up P fromsparingly available form was related to the ability of a cultivar to acidify the rhizosphere. Seed P content wasa confounding factor in this system, and the use of relatively uniform seed with similar P content, preferablylow, was conducive to a successful outcome of the screening process.
文摘Ammonia volatilization losses from urea applied as a basal fertilizer and a top dressing at tillering stage in a wheat field of Taihu Region, China, were measured with a micrometeorological technique. Urea as fertilizer was surface broadcast at 81 (low N) and 135 (high N) kg N ha-1 as basal at the 3-leaf stage of the wheat seedling on December 2002, and 54 (low N) and 90 (high N) kg N ha-1 as top dressing on February 2003. Ammonia volatilization losses occurred mainly in the first week after applying N fert…
文摘Inorganic soil phosphorus extractable with sodium bicarbonate (NaHCO3-Pi), soil pH and root hairs length and density in the rhizosphere of two winter wheat cultivars (Triticum aestivum L. cv. Shichun,Sleipner) grown on a high pH Chinese silt loam (52.7 mg NaHCO3-Pi kg-1) and a Danish sandy loam (43.4mg NaHCO3-Pi kg-1) were studied to assess how these wheat cultivars differed in phoephorus uptake.The rhizosphere soil pH of two wheat cultivars grown on the two soils were fairly unchanged with increasing distance from the root surface. However the root hairs of Shichun were 2.1 times longer than those of Sleipner. Root surface area (RSA) of Shichun increased by 192% due to root hairs whereas root hairs of Sleipner increased RSA by 68% only. Hence the root system of Shichun was in contact with more soil than that of Sleipner, even though Sleipner had a longer root. Grown at the lower pH and level of NaHCO3-Pi in the Danish soil Shichun absorbed more inorganic phosphorus than Sleipner whereas at the higher pH and level of NaHCO3-Pi in the Chinese soil there was no phosphorus uptake difference between the two wheat cultivars.
文摘The genetic variation of Italian ryegrass (Lolium multiflorum Lain.) and westerwolds ryegrass (L. westerwoldicum Breakw.) was investigated in eight tetraploid cultivars originated from Poland. The 337 individual seedlings, cultivated in uniform greenhouse conditions, were tested with horizontal gel electrophoresis according to five enzyme systems: diaforase (DIA), superoxide dismutase (SOD), glutamate oxalacetate transaminase (GOT), peroxidise (PX) and phosphogluco isomerise (PGI), which were used to array allelic diversity at five polymorphic loci. The estimation of genetic diversity in 64 plants of the same cultivars was studied using inter simple sequence repeats (ISSRs) as molecular marker. The genetic variation described by ISSR suggests that the polymorphism detected appears to be poorly informative at the taxonomic level. For statistical analysis, unweighted pair group method with arithmetic mean (UPGMA) based dendrograms and minimum spanning trees were constructed using Nei's distance and Jaccard' s similarity coefficient.