Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Case study of developing an integrated water and nitrogen scheme for agricultural system on the North China Plain

100%

Liu Y., Tao F., Lao Y., Ma J.

International Agrophysics

2013

tom 27

nr 4

Appropriate irrigation and nitrogen fertilization, along with suitable crop management strategies, are essential prerequisites for optimum yields in agricultural systems. This research attempts to provide a scientific basis for sustainable agricultural production management for the North China Plain and other semi-arid regions. Based on a series of 72 treatments over 2003-2008, an optimized water and nitrogen scheme for winter wheat/summer maize cropping system was developed. Integrated systems incorporating 120 mm of water with 80 kg N ha-1 N fertilizer were used to simulate winter wheat yields in Hebei and 120 mm of water with 120 kg N ha-1 were used to simulate winter wheat yields in Shandong and Henan provinces in 2000-2007. Similarly, integrated treatments of 40 kg N ha-1 N fertilizer were used to simulate summer maize yields in Hebei, and 80 kg N ha-1 was used to simulate summer maize yields in Shandong and Henan provinces in 2000-2007. Under the optimized scheme, 341.74 107 mm ha-1 of water and 575.79 104 Mg of urea fertilizer could be saved per year under the wheat/maize rotation system. Despite slight drops in the yields of wheat and maize in some areas, water and fertilizer saving has tremendous long-term eco-environmental benefits.

DNA polymorphism of introns 1 and 2 of prolactin receptor gene and its association with litter size in goats

76%

Ran D., Jing Y., Ming-Xing C., Gui-Ling C., Tao F., Li F., Zhong-Xiao Z.

Animal Science Papers and Reports

2011

tom 29

nr 4

The prolactin receptor (PRLR) gene was studied as a candidate gene for the high prolificacy of Jining Grey goats. Polymorphisms in intron 1 and intron 2 of PRLR gene were detected in high prolificacy (Jining Grey) and low prolificacy (Boer, Wendeng dairy, Liaoning Cashmere and Beijing) native goats using PCR-SSCP. For intron 1, five genotypes (AA, AH, AK, HH and HK) were identified in Jining Grey goats, and two (AA and AK) in the other four breeds. The Jining Grey does of genotype HH, HK, AH and AK delivered by 0.65, 0.62, 0.59 and 0.57 more kids (P<0.01) than those of genotype AA, respectively. For intron 2, three genotypes (CC, CD and DD) were detected in Boer goats, and two (CC and CD) in the other four breeds. The Jining Grey does of genotype CD delivered by 0.55 (P<0.01) more kids than those of genotype CC.

Ograniczanie wyników

1 Animal Science Papers and Reports

1 International Agrophysics

2 Tao F.

1 Gui-Ling C.

1 Jing Y.

1 Lao Y.

1 Li F.

1 Liu Y.

1 Ma J.

1 Ming-Xing C.

1 Ran D.

1 Zhong-Xiao Z.

1 2013

1 2011

Wyniki wyszukiwania

Case study of developing an integrated water and nitrogen scheme for agricultural system on the North China Plain

DNA polymorphism of introns 1 and 2 of prolactin receptor gene and its association with litter size in goats