云南主要糖用甘蔗品种的饲用价值研究

以王草为对照,对云南省糖用甘蔗品种"选3"、"桂糖11"、"桂糖12"和"川糖61 408"进行了物候期观测,并对不同物候期的再生性、常规养分、主要矿物元素及干物质体外消化率进行了研究。结果表明,糖用甘蔗分蘖和再生能力差、干质量低。相同物候期,粗蛋白含量低于对照牧草,粗纤维则高于对照;但在相同生长时间内,甘蔗主要养分与对照牧草差异不大;甘蔗生长后期纤维化速度比对照牧草慢,全生育期粗纤维含量变化不大。与已知的绝大多数牧草相反,甘蔗的消化率和适口性在幼嫩期不理想,但两者均随生育期的延长有较大幅度提高。从饲用角度考虑,甘蔗特别适合于成熟期一次性刈割利用,但不适于以多次刈割利用为目的的饲用栽培。

对拔节期后的糖用甘蔗的营养价值分析

利用拔节期后的糖用甘蔗,测定了其茎秆、蔗梢、蔗叶的营养成分及黄牛对其干物质的降解率,并结合同期甘蔗育肥肉牛的效果试验,对甘蔗的营养价值作了综合分析。

Varietal Characteristics and Nutrition Characteristics of Several New Varieties of High Biomass Sugarcanes for Sugar and Energy

[Objective] The aim was to study the varietal characteristics of six new varieties of high biomass sugarcanes for sugar and energy namely GT02-833,GT97-69,GT02-351,GT03-2287,B9 and GT02-770,as well as the nutrition characteristics of them under drip irrigation conditions. [Method] Industrial and agronomic characters,total N,total P,total K and chlorophyll content were determined. [Result] Cane yield,total biomass yield and sugar content of six varieties were more than 180,200 and 25 t/hm2 respectively,which were higher than that of the control Xintaitang 22. The total nitrogen and total phosphorus contents of six varieties were high and persistent from Jul to Nov,but they decreased sharply in Dec. Total potassium content of all varieties increased from Jul to Dec. Chlorophyll content of all varieties were high from Aug to Oct,but they decreased sharply in Nov. Total nitrogen,total phosphorus and total potassium content of GT02-833,GT97-69 and B9 were higher than that of CK. [Conclusion] GT02-833,GT97-69 and B9 had characteristic of efficient use of nutrients,thus should be extended as elite varieties.

杜邦公司在巴西市场的销售增长

2005年杜邦公司的作物保护业务在巴西市场的销售额增长了7％，特别是在糖用甘蔗市场上。公司的种子分公司一先锋国际良种公司（PioneerHi—Bred International）预计2005年的销售将比上年同期有所增长。尽管巴西市场经济条件困难，但是公司的种子销售仍旧增长了40％多。公司声称，2006年巴西耐草甘膦大豆种子市场的销售预计将会进一步增长。