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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (6): 166-169.doi: 10.11924/j.issn.1000-6850.2012-1695

所属专题： 马铃薯

• 农学 农业基础科学 • 上一篇    下一篇

不同钾肥量与密度对马铃薯产量及商品率的影响

陈功楷 权伟 朱建军   

  • 收稿日期:2012-05-03 修回日期:2012-06-12 出版日期:2013-02-25 发布日期:2013-02-25
  • 基金资助:
    浙江省重大科技计划项目资助 “薯类新品种选育及超高产栽培技术研究” (2008C12080-03)。

Effects of Potassium Rates and Planting Density on Potato Yield and Commodity Rate

  • Received:2012-05-03 Revised:2012-06-12 Online:2013-02-25 Published:2013-02-25

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摘要： 为了解施钾量与栽植密度对马铃薯产量及商品率的影响，在地膜覆盖条件下进行了不同钾肥量和密度试验，两因素各设置3个水平，随机区组排列，供试马铃薯品种为‘中薯3号’。结果表明：不同施钾量处理间产量呈极显著差异(P＜0.01)，A（2硫酸钾375 kg/hm2）>A（3硫酸钾225 kg/hm2）>A（1硫酸钾525 kg/hm2），理论最佳施钾量为硫酸钾367.5 kg/hm2；不同栽植密度处理间产量呈极显著差异(P＜0.01)，B（1 63000株/hm2）>B（2 69000株/hm2）>B（3 78000株/hm2），在栽植63000~78000株/hm2范围内，马铃薯产量与栽植密度呈负相关，理论最佳栽植密度为63000株/hm2；产量达最高时的最优组合为A2B1，即硫酸钾375 kg/hm2，栽植密度为63000株/hm2，产量为17577.7 kg/hm2；不同施钾量水平下的商品率为A1>A2>A3，随着施钾量的减少，商品率降低；不同栽植密度水平下的商品率为B1>B2>B3，随着栽植密度的增加，商品率下降；商品率达最高时的最优组合为A1B1，即硫酸钾525 kg/hm2，栽植密度为63000株/hm2，商品率最高达68.4%。

关键词: 生物覆盖, 生物覆盖

Abstract: In order to understand the effects of potassium rates and density on potato yield and commodity rate, a field experiment was conducted under plastic covering. Two factors each set three levels, randomized block arrangement, potato of‘ZhongShu NO.3’was supplied. The results showed that: there was very significant difference between different potassium rates (P＜0.01), A2 (K2SO4 375 kg/hm2) > A3 (K2SO4 225 kg/hm2) > A1 (K2SO4 525 kg/hm2), the theoritical K application rate for gaining maximum yield was 367.5 kg/hm2. There was very significant difference between different planting density (P＜0.01), B1 (63000/hm2) > B2 (69000 /hm2) > B3 (78000/hm2). There was a negative correlation between the potato yield and planting density, within the planting density of 63000/hm2-78000/hm2. The theoritical planting density for gaining maximum yield was 63000/hm2. The optimal combination for the maximum yield (17577.7 kg/hm2) was A2B1, with K2SO4 375 kg/hm2 and planting density of 63000/hm2. The commodity rate of different potassium rates was A1 > A2 > A3, the commodity rate decreased with the reducing of potassium rates. The commodity rate of different planting density was B1 > B2 > B3, the commodity rate decreased with the increasing of potassium rates. The theoritical potassium application rate for gaining maximum yield was 367.5 kg/hm2. The optimal combination for the maximum commodity rate (68.4%) was A1B1, with K2SO4 375 kg/hm2 and planting density of 63000/hm2.