不同营养土配比对玉米育苗移栽产量的影响

Significance and Restrictions as well as Countermeasures for the Development of Mutton Sheep Industry

摘要:

设计4种营养土配比试验，选出最优的营养上配比组合，并对影响产量的构成因素进行分析，结果表明：20%EM堆肥+60%田土+20%草炭+纯N0.2kg/m₃+K₂O 0.12kg/m₃+P₂O₅ 0.2kg/m₃配比组合最好，产量最高，使单穗粒重、粒数、百粒重有明显提高。另外，EM堆肥可提高土壤速效性养分当季利用率，K最明显。

Abstract:

World mutton yield were 6.8 million tones in 1970’s, 9 million tones in the end of 1980’s and 9.98 million tones in 1994. There are three main charactoristics in world mutton sheep production. They are lamb production, careass weight 13~25 kg; Crossed mutton production, large size rams as Suffolk, Borderleister are used, corssing model in cludes two breeds, three breeds and four breeds; Set up of breeding-reproduction system, large scale of production are formed.
Individual productivity of mutton is quite low in Chinese sheep. Mutton sheep industry is a weak point in the overall structure of animal husbandry, a great potential for development exists. Low cholesterol content and market potential decide the sustainable increase of demand. The conversion efficiency of feed nutrient to mutton is ten times as that to wool in sheep. The environment and condition in Jilin province are suitable for mutton sheep development. While the following problemy should be first settled; policy guidance, research intensity and breeds of mutton sheep.