A complete randomized block design was used in the experiment.The nutritional value of alfalfa,and correlation analysis were studied in this research.Several results were obtained from the experiment.As cutting times of alfalfa increased,the plant height decreased,plant height of the top four alfalfa varieties was Sandili,Derby,Golden queen,Sitle,and plant height of which was more than 60 cm.The 14 alfalfa varieties could survive safely the winter.Sitle has the highest dry matter yield(up to 16.14 t/hm2),next comes Golden queen,Sandili,Empress,ACAah.The change of the same element varied with the rice variety,leaf-stem ratio of Affinity was the highest among the fourteen alfalfa varieties(up to 54.69%),the following is Multiking,Derby,Golden queen,Millennium,and the leaf-stem ratio of the first five varieties was above 50%;crude protein content of Multiking was the highest(up to 20.21%),the following is Affinity,Millennium,ACAah,Derby.Dry matter yield had significant positive correlation with plant height(P<0.05),leaf stem ratio had extremely significant positive correlation with crude protein content and extremely significant negative correlation with crude fiber(P<0.01),so in breeding and introducing new alfalfa varieties,dry matter yield and nutritional value could be predicted in the field by plant height and leaf stem ratio,and we also could predict yield and nutri?tional value by measuring plant height and leaf stem ratio in the field.

To study the production performance and nutritional value of alfalfay,a complete randomized block design was used in this experiment.The results showed that Sitle has the highest dry matter yield up to 16.14 t/hm2 and next comes Golden queen,Sandili,Derby and ACAah,which showed the dry matter yields up to 15.52 t/hm2,15.06 t/hm2,13.99 t/hm2 and 12.54t/hm2,respectively.As cutting times of alfalfa increased,the dry matter yields decreased and significant differences were onserved among five cutting times.The first cutting had the highest yield and the dry matter yield of first three cutting times make up 82.01% of the total yield.Plant height of the top four alfalfa varieties was Sandili,Derby,Golden queen and Sitle,which were more than 60cm.Affinity shows the highest leaf-stem ratio among the fourteen alfalfa varieties,and the following is Multiking,Derby,Golden queen and Millennium.The leaf-stem ratio of the first five varieties was all above 50%.The crude protein content of Multiking was highest.The yield of crude protein of Golden queen was the highest of 2.93 t/hm2 and the following is Derby,Sandili,Sitle and ACAah.

中州盆景应具有古雅风格。在制作山水盆景时力争表现秀、壮、险、叠、广的山势磅礴,平原广阔,神韵丰富、气象万千的中原地理风貌特点。在制作树桩盆景时,要充分利用河南省丰富的树种资源如柽柳、野山楂以及松、柏、榆、槐、黄荆、女贞、雀梅等,凝炼出中州大地的风姿神采。相材立意,寓情于景,制造出气韵生动、意境深远的艺术珍品。

The forestry landscape system on the Yellow River beach responds six main functions,such as protection,sightseeing,economy,ecology,education and compound.According to the development requests of the beach,the forestry landscape system of the Yellow River beach were divided into following function types: protection-conservation of water and soil-cushion forest,protection-conservation of water and soil-amusement and creation-biodiversity protective forests,the ornamental-amusement and creation-education-germplasm resources forest,the amusement and creation-leisure-watching forest,the economicwatching-amusement and rest forest,the ornamental-amusement and rest-education-biodiversity protective forests and so on.

The landscape development of the Yellow River Beach in Zhengzhou city is one of the important actions of the Yellow River Beach synthesis countermeasures,only study the landscape development strategy of the Yellow River Beach thoroughly can we carry on the development reasonably.Firstly,the paper introduced the geography survey and the resources present situation of the research area,analyzed the superiority and the insufficiency of the landscape development of the Yellow River Beach.Then carried on the landscape development localization of the Yellow River Beach,formulated the landscape development goal,and elaborated detailedly how to carry on the effective landscape control which will benefit to the sustainable development of the landscape.This paper provided the basis for the landscape development of the Yellow River Beach through the research

The Yellow River beach in Zhengzhou city was taken as the research area, based on the on-the-spot investigation and the satellite photo materials through reconstruction aim was located reasonably, the landscape structure was controlled, the landscape district was divided and the ecology-economic method was used, the ecological reconstruction planning of the Yellow River beach in Zhengzhou city was carried on. Ecosystem of the Yellow River beach in Zhengzhou city contains huge potential ecosystem service functions and values. Main performance: ecological functions: maintaining biodiversity function, adjusting climate and self-controlling water source function, maintaining soil and purifying environment function, preventing disaster function; economical production functions and social functions: scientific research and education function, traveling and inheritance value.