The purpose was to define the control efficiency and safety of 20% cy- halofop-butyl WP on grass weeds in direct seeded rice fields, in order to provide the basis for chemical weeding. This study measured Leptochloa c...The purpose was to define the control efficiency and safety of 20% cy- halofop-butyl WP on grass weeds in direct seeded rice fields, in order to provide the basis for chemical weeding. This study measured Leptochloa chinensis（L.） Nees, Echinoch/oa crusgalli （L.） Beauv and other gramineous weed control efficiency with four concentrations of 20% cyhalofop-dutyl WP and 100 g/L cyhalofop-dutyl EC in direct seeded rice fields, and analyzed the yield-increasing effect and safety of rice. The results showed that 20% cyhalofop-butyl WP had a good control efficiency on grass weeds such as Leptochloa chinensis（L.） Nees, Echinoch/oa crusgalli（L.） Beauv and other grasses. The effective dosage of 90-150 g/hm2 was over 90.7% on Lep- foch/oa chinensis（L.） Nees and the comprehensive control effect of the grass weeds was above 86.7%, which was basically consistent with 100 g/L cyhalofop-dutyl EC. Furthermore, 20% cyhalofop-dutyl WP was high security for direct seeded rice fields. The yield of rice was increased by 10.18%-11.22% after spraying herbicide. There- fore, 20% of cyhalofop-dutyl WP can be used as a special herbicide for controlling Leptochloa chinensis（L.） Beauv in direct seeded rice fields, and has a good applica- tion prospect.展开更多
The aim of this paper is to analyze fluctuation in nutritional value of Dactylis glomerata and Festuca pratensis varieties grown on mineral and organic soil. Moreover, the paper deals with analysis of their nutritiona...The aim of this paper is to analyze fluctuation in nutritional value of Dactylis glomerata and Festuca pratensis varieties grown on mineral and organic soil. Moreover, the paper deals with analysis of their nutritional value in terms of animal feeding. This paper has drawn on two field experiments set up and carried out between 2010 and 2013 by the Research Centre for Cultivar Testing in Slupia Wielka. The experiment was conducted in two experimental stations： one in the Research Centre for Cultivar Testing in Krzyzewo and the other in the Experimental Stations for Variety Testing in Uhinin, being a branch of the Research Centre for Cultivar Testing in Cicibor Duzy. The experiment was arranged and conducted according to COBORU guidelines. The experimental plots were sown with varieties of Dactylis glornerata： Niva, Tukan, Amila, Crown Royale and with varieties of Festuca pratensis： Limosa, Pasja, Anturka, Amelka （d. AND 1009）. In the experimental plots with the varieties of Dactylis glornerata the grass was harvested six times a year and chemical analysis of the biomass was done taking dry matter only from five cuts. The varieties of Festuca pratensis were harvested four times. The RFV （relative feed value） was determined using the Linn and Martin method. Linn and Martin＇s test proved that Festuca pratensis had better nutritional value than Dactylis glomerata. For Dactylis glomerata, no matter what the variety and location was, the relative feed value ranged from 125 to 151, which puts that grass species in II quality class, good enough to feed high production dairy cows and heirs selected for replacements. The analysis of the relative feed value proved that no matter from which cut, the biomass ofDactylis glornerata belonged in Ill quality class, （RFV between 103 and 124） and it can be used to feed good beef cattle, older heifers and, in small quantities, dairy cows.展开更多
基金Supported by Natural Science Foundation of Hunan Province(12JJ6026)Innovation Platform in Higher Educational Institutions of Hunan Province(14K053)Hunan Province Higher Educational Institutions Industrialization Program(13CY030)~~
文摘The purpose was to define the control efficiency and safety of 20% cy- halofop-butyl WP on grass weeds in direct seeded rice fields, in order to provide the basis for chemical weeding. This study measured Leptochloa chinensis（L.） Nees, Echinoch/oa crusgalli （L.） Beauv and other gramineous weed control efficiency with four concentrations of 20% cyhalofop-dutyl WP and 100 g/L cyhalofop-dutyl EC in direct seeded rice fields, and analyzed the yield-increasing effect and safety of rice. The results showed that 20% cyhalofop-butyl WP had a good control efficiency on grass weeds such as Leptochloa chinensis（L.） Nees, Echinoch/oa crusgalli（L.） Beauv and other grasses. The effective dosage of 90-150 g/hm2 was over 90.7% on Lep- foch/oa chinensis（L.） Nees and the comprehensive control effect of the grass weeds was above 86.7%, which was basically consistent with 100 g/L cyhalofop-dutyl EC. Furthermore, 20% cyhalofop-dutyl WP was high security for direct seeded rice fields. The yield of rice was increased by 10.18%-11.22% after spraying herbicide. There- fore, 20% of cyhalofop-dutyl WP can be used as a special herbicide for controlling Leptochloa chinensis（L.） Beauv in direct seeded rice fields, and has a good applica- tion prospect.
文摘The aim of this paper is to analyze fluctuation in nutritional value of Dactylis glomerata and Festuca pratensis varieties grown on mineral and organic soil. Moreover, the paper deals with analysis of their nutritional value in terms of animal feeding. This paper has drawn on two field experiments set up and carried out between 2010 and 2013 by the Research Centre for Cultivar Testing in Slupia Wielka. The experiment was conducted in two experimental stations： one in the Research Centre for Cultivar Testing in Krzyzewo and the other in the Experimental Stations for Variety Testing in Uhinin, being a branch of the Research Centre for Cultivar Testing in Cicibor Duzy. The experiment was arranged and conducted according to COBORU guidelines. The experimental plots were sown with varieties of Dactylis glornerata： Niva, Tukan, Amila, Crown Royale and with varieties of Festuca pratensis： Limosa, Pasja, Anturka, Amelka （d. AND 1009）. In the experimental plots with the varieties of Dactylis glornerata the grass was harvested six times a year and chemical analysis of the biomass was done taking dry matter only from five cuts. The varieties of Festuca pratensis were harvested four times. The RFV （relative feed value） was determined using the Linn and Martin method. Linn and Martin＇s test proved that Festuca pratensis had better nutritional value than Dactylis glomerata. For Dactylis glomerata, no matter what the variety and location was, the relative feed value ranged from 125 to 151, which puts that grass species in II quality class, good enough to feed high production dairy cows and heirs selected for replacements. The analysis of the relative feed value proved that no matter from which cut, the biomass ofDactylis glornerata belonged in Ill quality class, （RFV between 103 and 124） and it can be used to feed good beef cattle, older heifers and, in small quantities, dairy cows.
