姥山马尾松1代种子园良种选育

经过１０多年努力，姥山马尾松１代无性系种子园建成投产，经造林测定，６年生子代林的树高、胸径、村积生长量分别比对照提高１５．２％、１８．４％、５６．８％．良种效益显著，并经浙江省林木良种审定委员会审定通过。     

Influences of the Paddy Rices with Different Moistures on the Head Rice Recovery

A major component rice varietv of Xiangwanxian 9 (a late Indica variety) with 13.1%, 15.6% and 18.3% of the moisture was respectively mixed with three ad-ditive varieties in 13% of moisture at ration of 7:3 for processing assorted rices. Head rice recovery of the treatments was determined 24 hours later. Analysis indicated sig-nificant differences exist in the effects produced by the component varieties, their moistures and the component variety moisture.     

耐热黄瓜栽培技术

总结新育成耐热黄瓜品种——丰田6号、丰田16号在厦门地区夏季栽培的主要技术。     

沈阳市优质高产水稻品种品比试验研究

对引进的14个水稻新品种进行品比试验,鉴定各品种的丰产性、抗逆性及适应条件。试验表明:适合在沈阳地区示范推广的主要品种为辽星1号、千重浪2号、盐粳68、辽优1052和盐丰47;辽优1052相对比较适宜沈阳市以南的中晚熟稻区,并提出了部分品种在推广中应注意的问题,为水稻品种的选用提供参考。     

广东柑橘品种改良研究进展

我国是重要的柑橘原产地之一，现有栽培面积和产量居世界首位。广东的气候和地理条件非常适宜柑橘生产，栽培历史悠久，主栽品种多为地方品种，产业特色明显，产业规模居全国前列。然而，目前柑橘生产上存在主栽品种品质退化、成熟期集中、品种结构不甚合理、品种改良滞后等问题，制约着广东柑橘产业健康发展。广东柑橘种质资源丰富，开展种质资源多样性分析评价，综合运用常规育种方法与生物技术手段，培育高产、抗逆、不同成熟期的优质新品种，是新时期广东柑橘产业持续稳定发展的基础。据不完全统计，广东共选育出金葵蜜橘、无籽砂糖橘、少核贡柑等33个柑橘新品种，品种不断更新换代，为全省柑橘产业发展和品种结构调整提供了有力支撑。回顾了广东柑橘产区分布情况和品种结构调整概况，介绍了广东柑橘种质资源多样性以及柑橘品种改良的主要方法，总结了广东柑橘新品种选育成绩，提出了广东柑橘品种改良中的存在问题，并进一步探讨了今后广东柑橘品种改良的方向。     

不同紫花苜蓿品种引种试验研究

引进了国外8个苜蓿品种,在2003年至2005年对其产量、株高、营养价值、越冬率、越夏性、抗倒伏和经济效益等方面进行了比较,结果表明这8个苜蓿品种在郑州地区均表现了良好的适应性,其中WL232和猎人河是推广的首选品种。     

Response of Cotton to Irrigation Methods and Nitrogen Fertilization: Yield Components,Water‐Use Efficiency,Nitrogen Uptake,and Recovery

Efficient crop use of nitrogen (N) fertilizer is critical from economic and environmental viewpoints, especially under irrigated conditions. Cotton yield parameters, fiber quality, water‐ and N‐use efficiency responses to N, and irrigation methods in northern Syria were evaluated. Field trials were conducted for two growing seasons on a Chromoxerertic Rhodoxeralf. Treatments consisted of drip fertigation, furrow irrigation, and five different rates of N fertilizer (50, 100, 150, 200, and 250 kg N /ha). Cotton was irrigated when soil moisture in the specified active root depth was 80% of the field capacity as indicated by the neutron probe.

Seed cotton yield was higher than the national average (3,928 kg/ha) by at least 12% as compared to all treatments. Lint properties were not negatively affected by the irrigation method or N rates. Water savings under drip fertigation ranged between 25 and 50% of irrigation water relative to furrow irrigation. Crop water‐use efficiencies of the drip‐fertigated treatments were in most cases 100% higher than those of the corresponding furrow‐irrigated treatments. The highest water demand was during the fruit‐setting growth stage. It was also concluded that under drip fertigation, 100–150 N kg/ha was adequate and comparable with the highest N rates tested under furrow irrigation regarding lint yield, N uptake, and recovery. Based on cotton seed yield and weight of stems, the overall amount of N removed from the field for the drip‐fertigated treatments ranged between 101 and 118kg and 116 and 188 N/ha for 2001 and 2002, respectively. The N removal ranged between 94 and 113 and 111 and 144 kg N/ha for the furrow‐irrigated treatments for 2001 and 2002, respectively.     

干旱对不同地力水平、不同品种小麦生育性状及产量的影响

在相同的水分条件下 ,对不同地力水平、不同品种小麦的生育性状及产量进行比较。研究结果表明 ,小麦品种 9350 31在高肥力条件下表现突出 ,鲁麦 2 1适应性广 ,在中、低肥力地块上表现最佳     

花椰菜新品种—丰花60

‘丰花６０’为秋中早熟花椰菜一代杂种，成熟期约６０ｄ，花球组织致密，雪白细嫩，平均单球重０．５７－０．９０ｋｇ，产量３００００ｋｇ／ｈｍ＾２，比对照品种白峰增产２６．９％－４８．３％，生长势强，抗病性好。     

科学养狐 走出困境

本文详细介绍了新源良种狐繁育场引进国内外科研成果，改良提高国产蓝狐质量，加大科技投入，保持和发挥优良种狐的遗传潜力和抓好基础建设，提高饲养管理的科技含量的成功经验。