Potassium management in potato production in Northwest region of China
Potassium management in potato production in Northwest region of China
复制标题
DOI：
10.1016/j.fcr.2015.01.010
复制
发表时间：
2015-03
影响因子：
5.8
通讯作者：
Shutian Li;Y. Duan;Tian-wen Guo;Ping-liang Zhang;P. He;A. Johnston;A. Shcherbakov
中科院分区：
文献类型：
--
作者：
Shutian Li;Y. Duan;Tian-wen Guo;Ping-liang Zhang;P. He;A. Johnston;A. Shcherbakov
通过田间试验，研究马铃薯（Solanum tuberosumL）产量和品质对钾（K）施用的响应、土壤本地钾素供应（IKS）和生产力（IKP）、钾素利用效率和土壤测试钾素临界水平，建立马铃薯生产中钾素管理的科学方法。结果表明，施用钾肥使块茎产量增加了 -2.8 至 7.2 Mg ha−1，平均为 3.2 Mg ha−1，90% 的阳性反应。与不施钾的处理相比，施用钾的商品率平均提高 4.9%，平均块茎重量提高 11.3 克，块茎淀粉含量提高 0.4%，块茎糖含量降低 0.2%。钾的平均农艺效率 (AEK) 为 30.2 公斤块茎 kg−1K2O，56% 的观察结果为 10–40 公斤块茎 kg−1K2O。 79.2% 的观测结果显示马铃薯田出现负钾平衡，平均亏缺为 101.7 kg K ha−1。所有观察结果中的 87.5% 显示施钾带来积极效益，平均回报为 715 ha−1 美元。平均 IKS 和 IKP 分别为 141.8 kg K ha−1 和 25.9 Mg ha−1，分别可以用土壤交换性 K 解释 25% 和 30% 的变化。产量响应与相对产量之间存在显着负二次关系（R2=0.75，P<0.01），产量响应之间存在显着线性关系（R2=0.80，P<0.01）。并获得AEK。马铃薯植株吸收钾总量与块茎总产量之间存在显着相关性（R2=0.74，P<0.01）。 90%相对产量时土壤交换性钾的临界水平为105mg·kg−1，可作为钾肥推荐的参考。
Field trials were conducted to study response of potato (Solanum tuberosumL) yield and quality to potassium (K) application, soil indigenous K supply (IKS) and productivity (IKP), K use efficiency and critical level of soil test K to establish scientific methods for K management in potato production. Results indicated that K application increased tuber yield by a range of −2.8 to 7.2 Mg ha−1with an average of 3.2 Mg ha−1, 90% positive responses. Potassium application produced an average of 4.9 percentage more commercial rate, 11.3 g more mean tuber weight and 0.4 percentage more tuber starch content and 0.2 percentage less tuber sugar content than those of treatment without K application. The average agronomic efficiency of potassium (AEK) was 30.2 kg tuber kg−1K2O, 56% observations was in 10–40 kg tuber kg−1K2O. 79.2% of the observations showed negative K balance in potato fields with an average of 101.7 kg K ha−1deficit. 87.5% of all the observations showed positive benefit from K application with an average return of US$715 ha−1. The average IKS and IKP was 141.8 kg K ha−1and 25.9 Mg ha−1which can be explained 25% and 30% of variations, respectively, by soil exchangeable K. Significant negative quadratic relationship (R2= 0.75,P< 0.01) between yield response and relative yield, and significant linear relationship (R2= 0.80,P< 0.01) between yield response and AEKwere obtained. There was a significant relationship (R2= 0.74,P< 0.01) between total uptake K by potato plant and total tuber yield. The critical level of soil exchangeable K at 90% relative yield was 105 mg kg−1which can be a reference for K recommendation.