Lu Jian-Wu, Qiu Hui-Zhen, Zhang Wen-Ming, Wang Di, Zhang Jun-Lian, Zhang Chun-Hong, Hou Shu-Yin
Gansu Key Laboratory of Aridland Crop Science, Lanzhou, China.
Ying Yong Sheng Tai Xue Bao. 2013 Feb;24(2):423-30.
In 2010, a field experiment with potato (Solanum tuberosum) cultivar 'Xindaping' was conducted at the Dingxi Extension Center of Gansu Province, Northwest China, aimed to understand the accumulation and distribution patterns of dry matter (DM) and potassium (K) in the organs of potato plant in semi-arid rainfed areas. During the whole growth period of the cultivar, the DM accumulation in root, stem, and leaf all showed a unimodal curve, with the DM accumulation rate being leaf > stem > root, whereas the DM accumulation in whole plant and tuber was an S-curve. The maximum DM accumulation rate of the whole plant was higher than that of the tuber, and appeared 17 days earlier. The distribution of DM in different organs showed two turning points, i.e., during the tuber formation (TF) period and the tuber growth (TG) period. During TF period, the DM accumulation was the greatest in leaf, followed by in tuber. The TF period was also the DM balance period, which occurred 90 days after emergence. Before the DM balance period, the DM accumulation in tuber was lesser than that in root, stem, and leaf, and there was a positive correlation between the DM accumulation in tuber and in root, stem, and leaf. However, after the DM balance period, the DM accumulation in tuber was greater than that in root, stem, and leaf, and the correlation was negative. At seedling stage and in TF period, TG period, starch accumulation period, and maturity period, the DM accumulation in whole plant was 5%, 30%, 60%, 4% , and 1%, while that in tuber was 0,18% , 62 , 18% , and 2%, respectively. In the whole growth period, more than 50% of the DM was formed in TG period. The K concentration was the highest in stem and the lowest in tuber, though the K was mostly concentrated in root before the DM balance period. The K accumulation before the DM balance period was mostly in root, stem, and leaf, with the sequence of stem > leaf > root, but after the DM balance period, the K was mainly allocated in tuber, with >60% of the K accumulated in tuber in maturity period.
2010年，在中国西北甘肃省定西市推广中心对马铃薯品种“新大坪”进行了田间试验，旨在了解半干旱雨养区马铃薯植株各器官干物质（DM）和钾（K）的积累与分配模式。在该品种的整个生育期内，根、茎、叶中的干物质积累均呈单峰曲线，干物质积累速率为叶＞茎＞根，而全株和块茎中的干物质积累呈S形曲线。全株干物质积累的最大速率高于块茎，且出现时间早17天。不同器官中干物质的分配有两个转折点，即块茎形成（TF）期和块茎生长（TG）期。在TF期，叶中干物质积累最多，其次是块茎。TF期也是干物质平衡期，出现在出苗后90天。在干物质平衡期之前，块茎中的干物质积累量低于根、茎和叶中的积累量，且块茎与根、茎、叶中的干物质积累量呈正相关。然而，在干物质平衡期之后，块茎中的干物质积累量高于根、茎和叶中的积累量，且相关性为负。在苗期、TF期、TG期、淀粉积累期和成熟期，全株干物质积累量分别为5%、30%、60%、4%和1%，而块茎中的干物质积累量分别为0、18%、62%、18%和2%。在整个生育期内，超过50%的干物质在TG期形成。钾浓度在茎中最高，在块茎中最低，尽管在干物质平衡期之前钾主要集中在根中。在干物质平衡期之前，钾的积累主要在根、茎和叶中，顺序为茎＞叶＞根，但在干物质平衡期之后，钾主要分配在块茎中，成熟期超过60%的钾积累在块茎中。
