Screening Of Maize Straw Feeding Varieties And The Establishment Of Cultivation System Of Foodstuff In North China

The study use Relative feed value(RFV)?Subordinate function?Principal component analysis(PCA)and Cornell net carbohydrate and protein system(CNCPS)four methods to respectively evaluate the feeding quality of different cultivars maize straw,and horizontal comparison between the method and analysis results in the different evaluation system,primarily confirmed the principal component analysis is a better method in evaluating the feeding value of the maize straws,it can combine multiple influence factors,the operability is strong and the efficiency is relatively higher.On the basis of this result,then the study use principal component analysis to analysis the feeding quality of 34 maize straw in North China,and sorted the feeding quality of straw.In addition,in order to explore the optimum cultivation mode of Zhengdan 958 and Weike 702 two maize cultivars that popularized in North China,and the study respectively set different gradient of maize planting density and fertilizer amount.By comprehensive analysis maize grain yield,straw yield and straw comprehensive feeding value of cultivation conditions,the study respectively select the best cultivation scheme of Zhengdan 958 and Weike 702 that grain and feed both are excellent.Based on the relative stability of the grain,the result can achieve grain and feed both excellent and provide important technical support for the maize farmers in the region.At the same time,it can moderate increase agricultural production and effectively reduce the environmental problems such as crop burning.Test 1:the study use Relative feed value?Subordinate function ?Principal component analysis and CNCPS to analysis the nutritive value of 15 maize cultivars straw in North China.After a comparative analysis,the method of principal component analysis in four methods is relatively simple but can effectively evaluate the feed value of maize straw.Test 2: 34 maize straws popularized in North China were collected as the sample.General nutrient analysis?Van Soest fiber analysis and other method were used to determine their nutritive value.Using SPSS software to perform principal component analysis and cluster analysis for the feed value of maize straw,the results show that the quality of 34 maize straws have difference,the order from high to low:NK718>Yufeng 303>Longping 206>Lianchuang 808>Zhenghuangnuo 2>Tunyu 808>Liyu97>Qiule218>Denghai605>Lianyu618>Tiantai16>Huanong138>Huayu14>Xianyu335>Xundan26>Luodan6>Yuhe988>Dika667>Luodan9>Xianke338>Liyu35>Xundan20>Xundan29>Yangguang98>Jinyu 1233>Liyu 16>Yangguang 99>Suiyu 1691>Liyu 86>Jixiang 1>Huayu 12>Zhengdan 958>Weike 702>Lianyu 58.The results of cluster analysis were NK718?Yufeng 303 and Longping 206 clustered a group;Lianchuang 808?Zhenghuangnuo 2?Tunyu 808 and Liyu 97 clustered a group;Qiule 218?Denghai 605?Lianyu 618?Tiantai 16?Huanong 138?Huayu 14 and Xianyu 335 clustered a group;Suiyu 1691?Liyu 86?Jixiang 1?Huayu 12?Zhengdan 958?Weike 702 clustered a group;Lianyu 58 alone clustered a group;Xundan 26?Luodan 6?Yuhe 988?Dika 667 and so on clustered in another group.The result of principal component analysis and cluster analysis showed that: the nutritive quality of NK718?Yufeng 303? Longping 206 ?Lianchuang 808?Zhenghuangnuo 2?Tunyu 808 and Liyu 97 are better.If followed the cultivation pattern and cultivation habit,and grain and feed both are excellent,and combined with the nutritive quality analysis results in the study,the cultivars can be taken into consideration,in order to raise the level of feed utilization of straw and increase the value of agricultural production.Test 3: Two maize varieties Zhengdan 958 and Weike 702 which approved by the nation popularized in North China were collected as the sample.Refer to the existing cultivation mode in North China,the study designed and constructed respectively the high yield agronomic technology system of high grain yield and straw feed quality of two varieties.The study adopted randomized complete-block design and set 60000 plants/hm2,67500 plants/hm2,75000 plants/hm2,82500 plants/hm2 four kinds of planting densities:,and five application levels of compound fertilizer: bottom fertilizer 0kg/hm2,600 kg/hm2,750 kg/hm2,900 kg/hm2 and seed fertilizer 750 kg/hm2.Use principal component analysis to analysis the feeding quality of maize straw that planted in different cultivation mode.Then combined with the maize grain yield and straw yield,constructed and validated the best cultivation modes of high grain yield and straw feed quality of Zhengdan 958 and Weike 702 in Shangqiu and Jiaozuo areas.