共查询到20条相似文献,搜索用时 328 毫秒
1.
中熟中粳水稻品种示范总结 总被引:2,自引:0,他引:2
扩粳压籼已成为睢宁水稻种植的必然趋势,我们从适宜苏北稻区种植的粳稻品种中筛选出8个中熟中粳品种(品系)进行对比示范种植,以期筛选出适宜睢宁县不同稻作方式推广种植的粳稻品种,通过2009年示范达到了预期目的。 相似文献
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
试验处理药剂为硫酸镉(3CdSO4·8H2O)和氯化镉(CdCl2·5/2H2O),镉处理浓度分别为0、0.5、1.0、2.0、5.0 mg/kg,采用土培盆栽方法研究12份水稻品种在分蘖盛期对镉的吸收特征差异。试验结果表明:根系含镉量受周围土壤镉含量影响较大,不能作为筛选低镉吸收水稻品种的鉴定指标;土壤中的镉含量只能作为筛选低镉吸收品种的间接指标,其镉残存量与处理浓度之间为二次回归关系,回归方程为y=-0.015x2+0.4001x+0.0874。植株体内镉含量,是最佳的可直接用于鉴定筛选低镉吸收品种的指标,处理浓度与植株体内含镉量呈极显著二次回归关系,回归方程为y=0.7431x2+0.3666x-0.0366。由间接和直接鉴定指标判定龙粳16、龙粳14、龙粳12及龙粳21为低镉吸收品种。 相似文献
12.
无性系良种径山茶品质特征暨多品种拼配研究 总被引:1,自引:0,他引:1
本文通过对鸠坑群体种(CK)、乌牛早、浙农139、浙农113、龙井43、龙井长叶、茂绿、迎霜、白茶、日本薮北种10只品种样的感官品质审评和生化呈味成分测试分析,以及7组品种的拼配加工效果试验,论证了无性系茶树良种的品质特征和某些不足是可以通过拼配加工实现优势互补的。由于径山茶是极易断碎的毛峰类名茶,故其拼配应在加工过程中进行。 相似文献
13.
14.
5个引种到西藏的燕麦新品种的灰色关联度评价 总被引:1,自引:0,他引:1
为筛选适合西藏农区种植的高产优质燕麦新品种,采用灰色关联度分析法对引种到西藏拉萨的5个燕麦新品种的主要经济性状进行了综合描述和量化评估。结果表明,9642-4、冀品1号综合性状优于其他品种;9642-4籽粒产量高,干草产量较低,适合在农区种植;冀品1号干草产量位居第一,适合在半农半牧区推广种植。 相似文献
15.
16.
2002~2010年对250个甜、糯玉米新品种进行玉米大斑病、小斑病、茎腐病和亚洲玉米螟的抗性鉴定。结果表明,不同年份间的平均病害级别差异显著,玉米螟的食叶级别无显著差异。所有鉴定品种中,对大斑病表现中抗以上的占80.0%,对小斑病表现中抗以上的占76.4%,对茎腐病表现中抗以上的占77.2%,对玉米螟表现中抗及以上的仅占5.8%。根据玉米类型分析,甜玉米的综合抗性高于糯玉米,甜玉米品种"蜜脆678"、"华珍"和"绿色超人"等12个品种以及糯玉米"浙糯玉4号"和"京甜紫花糯"等10个品种的综合抗性较佳,表现出较强的抗病虫性。 相似文献
17.
对起垄覆膜、起垄无膜处理与常规进行对比试验研究,结果表明:起垄覆膜处理水稻株高增加18.4 cm,分蘖起始时间早9 d、最高分蘖时间早7 d、最高分蘖增加47.5株/m2、穗数增加57.4穗/m2、齐穗和成熟早2 d和3 d、穗粒数增加6.15粒,而千粒重降低1 g、最终水稻理论增产102.8 kg/667 m2,实测产量增加26.6 kg/667 m2,增产达4.36%;起垄无膜处理水稻株高降低4.8 cm、收获穗数降低13.3穗/m2,理论产量减少19 kg/667 m2实测产量减少94.4 kg/667 m2,最终常规处理比起垄无膜处理增产14.65%。 相似文献
18.
Methods for the appraisal of varieties in forage grasses are examined in the light of results from an experiment. Five varieties of perennial ryegrass were grown as spaced plants, broadcast swards and swards with white clover, and all were subjected to five cutting treatments during the first and second harvest year.
Spaced plants and swards gave equally good information on the order in which varieties attained maximum rate of growth in spring each year; but in respect of actual yield, the order in which varieties were placed in spaced-plant culture was reversed in broadcast swards. It is suggested that the disparity may have arisen because all varieties were sown at a common seed rate; and that spaced-plant cultures give a better indication of relative potentialities than do the majority of sward trials.
Late-maturing varieties compared better with early varieties when each variety was cut with reference to date of ear emergence than when all varieties were cut simultaneously (that is, in respect of dry matter production: at a given stage of development the early varieties had a slightly higher nitrogen content than the late). The shortcomings of both systems of cutting, and the need for comprehensive tests, are discussed.
There was little interaction between method of culture and cutting treatment in this experiment. 相似文献
Spaced plants and swards gave equally good information on the order in which varieties attained maximum rate of growth in spring each year; but in respect of actual yield, the order in which varieties were placed in spaced-plant culture was reversed in broadcast swards. It is suggested that the disparity may have arisen because all varieties were sown at a common seed rate; and that spaced-plant cultures give a better indication of relative potentialities than do the majority of sward trials.
Late-maturing varieties compared better with early varieties when each variety was cut with reference to date of ear emergence than when all varieties were cut simultaneously (that is, in respect of dry matter production: at a given stage of development the early varieties had a slightly higher nitrogen content than the late). The shortcomings of both systems of cutting, and the need for comprehensive tests, are discussed.
There was little interaction between method of culture and cutting treatment in this experiment. 相似文献
19.
20.
物理条件对红掌组培苗生根和生长的影响 总被引:2,自引:0,他引:2
研究不同物理条件对粉冠军(Pink Champion)、华伦天奴(Valentino)、亚利桑那(Arizona)、粉爱(Pin-klove)4个红掌(Anthurium andreanum)品种组培苗生长的影响.通过观察不同温度和不同光照处理下各品种组培苗的根数、株高、叶宽、茎干粗壮度、叶片数等指标找出最佳培养条件.结果表明,增强光照有利于4个品种的组培苗生长,延长光照时间有利于粉冠军和粉爱两个品种的组培苗生长,不同品种适宜的培养温度不同. 相似文献