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Researches of Major Agrostology for Alfalfa in Ordos Plateau

Author: ZhangXiaoHua
Tutor: ZhangZhong
School: Inner Mongolia Agricultural University
Course: Grassland
Keywords: Alfalfa Plant management techniques Ordos Plateau
CLC: S541.9
Type: Master's thesis
Year: 2011
Downloads: 31
Quote: 1
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Abstract

2009-2010 in, Ordos City Etuokeqi Saiwusu Gacha, 15 varieties of alfalfa grassland on the 3rd, combining plot experiments and field trials to study the appropriate area of ??the Ordos Plateau alfalfa planting management technology, the results are as follows: 1. randomized block method, 15 fine varieties at home and abroad adaptive test, further local growth and development characteristics after planting various varieties of alfalfa, biological characteristics, as well as grass yields do more in-depth and detailed analysis and comparison, the final four screened the good varieties suitable for cultivation in the Ordos Plateau, grassland, prairie the 2nd Zhongmu Algonquin. The beginning of 2009, the study of the impact of different sowing dates on of alfalfa growth traits and grass production field trials using randomized block method. 2 years in a row on emergence time, seedling emergence, winter survival rate, plant height, phenology, forage yield, fresh and dry than to the leaf ratio measurement results show that the range of spring sowing and autumn sowing, emergence time and planting dates exist significant positive correlation between growth stages with the sowing period in advance and the corresponding advance; autumn sowing the sooner, the more coarse root collar, the deeper buried when wintering, the stronger, the higher the following year forage yield; different sowing date on leaf ratio and have little effect on fresh and dry. The Comprehensive Evaluation think typical plateau region of Ordos planting alfalfa should choose the autumn sowing, the threshold value in mid-September. Arrangement of different seeding rate and row spacing combination identified twelve sowing density study of planting density on alfalfa growth and development and production performance. Lower seeding density, flowering earlier, smaller plant height. Seeding density is too large, will affect grass production. Different planting density treatment trial-spaced 60cm seeding rate 1.0 g / m combination hay yield the highest of as 15874.8kg/hm to 2. Ordos typical plateau planted alfalfa seeding density select row spacing of 60cm, the seeding rate of 1.0g / m best. According to the the Ordos local soil moisture at different growth stages of the establishment of different irrigation amount, determined the alfalfa plant height, leaf ratio, forage yield. The results showed that the soil moisture 1890.69m 3/hm ~ 2 irrigation treatments fully able to meet the normal growth and development of alfalfa, more irrigation water savings; the irrigation treatments 2363.36m 3/hm ~ alfalfa plant height maximum, up to 120.83cm 1418.02m 3/hm ~ 2 irrigation treatments alfalfa plants minimum height is 101.57cm; 1890.69m ~ 3/hm alfalfa stems ~~ 2 irrigation treatments than the smallest leaf weight most abundant; 1890.69m the highest yield of alfalfa fresh grass ~ 3/hm ~ 2 irrigation treatments, alfalfa treatment than 2363.36m ~ 3/hm ~ 2 irrigation amount the fresh yield is 2.24% higher than 1418.02m ~ 3/hm ~ 2 irrigation amount of processing 28.21% higher. Locally grown alfalfa 1890.69m of ~ 3/hm to 2 irrigation amount is the most appropriate, alfalfa yield and the greatest degree of conservation of water resources. Alfalfa Weed Control order: the alfalfa net gt; 2,4-D butyl EC gt; the dextral topiramate fluoroacetamide grass Spirit gt; the fluazifop diclofop gt; the fine grasses grams EC gt; captor Net oil EC, alfalfa net control effect. Single chemical herbicides spectrum herbicide is likely to cause new competitive relationship between alfalfa and the rest of the weeds, indirectly increase the pressure on alfalfa growth, which may lead to a decline in alfalfa production.

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