Main cultivation factors to influence high yield of potato were studied by using the quaternary quadratic orthogonal regression rotational combination design to improve potato cultivation level and promote sustainable development of potato industry in Bijie City.The results showed that main factors to influence potato yield are potassium level > planting density > nitrogen level > phosphorus level.Increasing potassium level and planting density and rationally applying nitrogen and phosphorus fertilizer are the key technological links to gain super-high yield of potato.The cultivation technical measures for potato yield to gain 3 500 kg/667m2 are 5181~5819 holes/667m2 ,6.72~7.82kg/667m2 N, 10.06~16.9kg/667m2 P2 O5,and 22.72~28.18kg/667m2 K2 O.N ∶ P2 O5 ∶ K2 O is 1∶1.85 ∶ 3.50.
贵州省毕节市农科所生产的毕单系列玉米杂交种高产、稳产、品质好、抗逆性强、适应性广，是贵州山区特别是毕节市目前较理想的杂交玉米新品种。为充分发挥毕单系列玉米杂交种的增产潜力，服务三农，使农户获得高产、优质、低价的毕单系列玉米杂交种，现就其在海南杂交种制种技术要点进行探讨，以供同行参考。
为了探索马铃薯威芋3号高产高效栽培技术,设置单作不同种植密度、不同底肥种类(有机肥、复合肥)及不同施用量和套作以马铃薯行宽、行数为变量的玉米-马铃薯行比组合的高产高效栽培试验进行研究。结果表明,该品种单作以每亩种植4 500株、施用有机肥1 000 kg、复合肥40～50 kg(以50 kg较好)组合趋于合理;套作以1.7 m开厢,马铃薯与玉米行比2∶2的马铃薯产量最高,玉米产量比对照减产最低,马铃薯、玉米复合产量位居第一,是马铃薯新品种威芋3号与玉米套作的最适模式。从经济效益看,当前马铃薯价格看好,1.9 m开厢,3∶2模式的效益也很好,也是适宜模式。因此,马铃薯与玉米套作,可根据市场来定,哪个作物的效益好,就加大这一作物的比例。
Through the organic fertilizer not with field contrast test applied field,the results show that by using organic fertilizer not processing 1 is good performance in the field,the plants growing normal,ear a moderate,leaf color and comely,leaves thick,bald pointed degree,empty bar rate is low,-grain weight,stem leaf weight obviously higher than those of control,ear of thicker,can form a good economic output,the average 406.7kg compared with an average of 351.8kg,increase 54.9kg,increase production rate is 15.6%,the effect of increase significantly.
[Object] The aim of this research was to test the effect of the best fertilizer rales of cabbage in different soil tertility levels in practical application and Io guide the production in large tracts of land. [Method] Non-fertilizing,conventinnal fertilization and formula fertilization treatments were taken on the high fertility and medium fertility soil, the soil testing and formulated fertilization on vegetable cabbage yield and economic effect were studied. [Result] The results showd that in the high fertility test formula fertilization plot, comparing with the eonventional fertilization plot, the yield rate was increased and reached 4.8%, anti comparing with the non-fertilizing plot, the yield rate reached 22.4%. in the medium fertility test formula plot. comparing with the conventional fertilization plot, the yield rate reached 4.3%, and comparing with the non-fertilizing plot, the yield rate reached 26.8%. The production was increased greatly, and the economic benefit is obvious. [Conclusion] In the future,the fertilizer technology should be popularized in cabbage production, since it not only increase the production and the benefits but also improve the fertilizer using efficiency and reduce the fertilizer pollution to the environment, which is of far-reaching significance to the sustainable development of agriculture.
