共查询到20条相似文献，搜索用时 62 毫秒
1.
几种新型种衣剂对小麦生长及产量的影响 总被引：2，自引：0，他引：2
本文研究了几种新型种衣剂处理对小麦生长及产量影响.结果表明:几种新型种衣剂处理能提高小麦出苗率,处理较对照基本苗数提高3.48～13.68%;促进小麦生长,提高小麦产量,处理较对照增产3.8～13.2%,其中以激素增产型的增产效果最好. 相似文献
2.
本文研究了几种新型种衣剂处理对小麦生长及产量影响。结果表明：几种新型种衣剂处理能提高小麦出苗率，处理较对照基本苗数提高3．48～13．68％；促进小麦生长，提高小麦产量，处理较对照增产3．8～13．2％，其中以激素增产型的增产效果最好。 相似文献
3.
通过室内模拟试验 ,研究了胡敏酸、腐殖酸、黄腐酸等腐殖酸类物质对小麦、玉米、马铃薯等 3种作物的增产机理和增产效果 .研究结果表明 :各类腐殖酸施用后 ,增产效果明显 ,3种作物的平均亩产分别增加4 6.59kg( 14 .6% )、60 0 .0 0 kg( 17.2 2 % )和 16.80 kg( 2 .15% ) ;抗旱作用明显 ,能提高水分利用率 ;能改善土壤物理性质 ;增加、提高土壤营养水平 ,是低成本、高效益的天然肥料 .通过综合比较胡敏酸、腐殖酸、黄腐酸等 3种酸对小麦、马铃薯、玉米等 3种作物的产量、根、杆的增产效果以及抗旱、提前出苗等作用 ,综合效果的评价为 :胡敏酸 >腐殖酸 >黄腐酸 ;对作物效应来看 ,小麦 >马铃薯 >玉米 相似文献
4.
2016年10月—2017年6月,在关中中部灌区的三原县采用两因素二次D饱和最优设计,研究了不同播期和种植密度对农大399小麦产量和品质的影响.结果表明:不同播期和密度对农大399小麦群体数量、个体质量、产量及其结构和籽粒品质均有显著的影响.同一播期,群体随着密度的增加而增加,叶龄、单株分蘖和次生根分别降低5. 4%～16. 9%、10. 7%～19. 2%和9. 8%～30. 4%,成穗数提高3. 9%～7. 0%,穗粒数降低0. 5%～0. 6%,千粒重提高3. 8%～6. 1%;增产1. 9%～8. 3%,籽粒蛋白质、湿面筋、稳定时间和沉降值分别提高3. 9%～9. 9%、6. 5%～11. 2%、14. 5%～16. 8%和2. 4%～12. 9%,其他品质指标变化不大.同一密度情况下,群体随着播期的推迟降低3. 6%～8. 8%,越冬期叶龄、单株分蘖和次生根均显著降低,个体质量显著变差;成穗数和穗粒数分别降低1. 1%～8. 9%和1. 1%～4. 5%,千粒重增加1. 9%-3. 8%,减产3. 7%-13. 6%;籽粒蛋白质、湿面筋、稳定时间和沉降值较早播依次降低2. 9%～7. 0%、3. 3%～5. 1%、12. 4%～18. 1%和1. 4%～6. 1%,但对籽粒面粉和拉伸品质指标影响不显著.当目标产量在8 250 kg/hm~2～9 750 kg/hm~2时,农大399适宜播种期为10月7日～10月15日,适宜播种密度为2. 30×106株/hm~2～2. 89×106株/hm~2. 相似文献
5.
本文研究了汇油 5 0不同密度下的生育特性、产量表现及产量构成。在每公顷 30 0kg左右纯氮 ,密度4.5～ 7.5万株 /公顷稀植条件下 ,每公顷产量可达 2 90 0kg左右 ,比对照增产 1 1 .9%～ 1 6 .2 %。 相似文献
6.
通过土培试验和田间试验,研究了六种不同性质的种衣剂对小麦壮苗和增产的效果,结果表明,营养型和激素型种衣剂对培育小麦壮苗、提高小麦产量都有较好的作用.本文同时对种衣剂的成型原理、作用机理、理化性状及其复制工艺进行了初步探讨. 相似文献
7.
目的旨在筛选出适合本地区条件的高产、优质玉米杂交种,测试和了解引进玉米杂交种的特征、特性和表现,为下一步品种比较试验提供依据.结果表明:安2032、安2071、丰盛1号的单产均超过对照黔西4号665 4kg/667m2的产量,5个杂交种的单产超过对照毕玉4号533 6kg/667m2的产量,每667m2增产104 4～168 2kg,增长幅度19 6%～31 5%,增产效果明显.另外,各参试品种经济性状各具特色,在生育过程中均未发生玉米病害感染和虫害危害,对病虫害有一定抗性.结果表明各参试玉米杂交种均可作为下一年度玉米品种比较试验的材料. 相似文献
8.
壳聚糖类种衣剂对小麦某些生理特性及产量的影响 总被引：6，自引：0，他引：6
通过3年的盆栽、田间小区及示范试验表明，用壳聚糖复合型和生物型种衣剂分别处理小麦种子，均可促进小麦种子萌发和幼苗生长，提高植株抗逆能力。壳聚糖复合型和生物型种衣剂处理分别对比照增产19．6％和9．4％。 相似文献
9.
选择 1日龄固始鸡 60 0只 ,随机分成 5个处理组 ,分别在基础日粮中添加 0 .0 0 %、0 .0 8%、0 .1 6%、0 .2 4 %和 0 .32 %的赖氨酸 ,研究日粮赖氨酸水平对 0～ 63日龄固始鸡生长性能及胴体品质的影响。结果表明适度提高日粮赖氨酸水平可以提高固始鸡的增重、饲料转化率、全净膛率、胸肌率和腿肌率 ,且在 0～ 2 1日龄、2 2～ 42日龄和 43～ 63日龄时 ,日粮中总赖氨酸含量分别为 1 .0 0 %、0 .92 %和 0 .87%较为适宜。 相似文献
10.
11.
12.
13.
《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
14.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
15.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
16.
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
17.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
18.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
19.
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献