A field study was set up to compare dry matter accumulation and grain yield of 3 different types of film mulching, namely FFC(full film muched on tiny ridges covered with soil), PFC(full film muched covered with soil)...A field study was set up to compare dry matter accumulation and grain yield of 3 different types of film mulching, namely FFC(full film muched on tiny ridges covered with soil), PFC(full film muched covered with soil), and PF(full film muched with no cover). The experiment was laid out in a complete random design with 3 replications at northwest(34°40′N, 105°06′E) of China. This study determined that(1) film mulching treatment increased leaf area and dry matter accumulation of oil flax in semi-arid areas;(2) accumulation of dry matter under PFC treatment was markedly higher than other treatments except anthesis stage;(3) average grain yield of oil flax under film mulching treatment was 52.67%-60.33% higher than flat plot without mulched or ridge(CK) treatment;(4) grain yield of oil flax was substantially correlated with plant height, grain number and 1,000 kernels weight. This study demonstrated that film mulching has significant effects on crop grain yield improvement in the northwest of China.展开更多
以胡麻“坝选3号”为材料，设置不施钾（K0）、低钾（K1，18．75 kg K2 O／hm2）、中钾（K2，37．5 kg K2 O／hm2）和高钾（K3，56．25 kg K2 O／hm2）4个施钾（K2 O）水平，于2011－2012年在河北省张家口市开展田间试验，研究了不同施...以胡麻“坝选3号”为材料，设置不施钾（K0）、低钾（K1，18．75 kg K2 O／hm2）、中钾（K2，37．5 kg K2 O／hm2）和高钾（K3，56．25 kg K2 O／hm2）4个施钾（K2 O）水平，于2011－2012年在河北省张家口市开展田间试验，研究了不同施钾量对胡麻钾素营养转运分配及其产量的影响。结果表明，胡麻根、茎、叶和籽粒等器官的钾素累积主要在生殖生长阶段，占全生育期累积量的41．28％～64．09％；与不施钾相比，施钾条件下胡麻根、茎和叶钾素转运量分别增加了35．60％，29．06％和43．75％。根、茎和叶中均有钾素转运到籽粒，转运率分别为17．78％～24．85％，14．82％～23．00％和39．40％～46．20％，对籽粒钾素的贡献率分别为6．71％～14．12％，11．24％～23．97％和17．26％～50．83％。较不施钾处理，低、中和高钾水平下籽粒产量分别增产14．90％～24．12％，29．93％～30．11％和15．65％～23．13％，且中钾处理下增产幅度最大。综合胡麻钾素积累、转运与分配规律以及籽粒产量，本试验区同等肥力土壤条件下，要实现胡麻高产高效以施钾量37．5 kg／hm2为宜。展开更多
基金financial support provided by China Agriculture Research System of Construct Special (CARS-14-116)the National Natural Science Programs of China (31360315, 31460331)Fuxi Outstanding Talent Cultivation Plan of Gansu Agricultural University (Gaufx-02J05)
文摘A field study was set up to compare dry matter accumulation and grain yield of 3 different types of film mulching, namely FFC(full film muched on tiny ridges covered with soil), PFC(full film muched covered with soil), and PF(full film muched with no cover). The experiment was laid out in a complete random design with 3 replications at northwest(34°40′N, 105°06′E) of China. This study determined that(1) film mulching treatment increased leaf area and dry matter accumulation of oil flax in semi-arid areas;(2) accumulation of dry matter under PFC treatment was markedly higher than other treatments except anthesis stage;(3) average grain yield of oil flax under film mulching treatment was 52.67%-60.33% higher than flat plot without mulched or ridge(CK) treatment;(4) grain yield of oil flax was substantially correlated with plant height, grain number and 1,000 kernels weight. This study demonstrated that film mulching has significant effects on crop grain yield improvement in the northwest of China.
文摘以胡麻“坝选3号”为材料，设置不施钾（K0）、低钾（K1，18．75 kg K2 O／hm2）、中钾（K2，37．5 kg K2 O／hm2）和高钾（K3，56．25 kg K2 O／hm2）4个施钾（K2 O）水平，于2011－2012年在河北省张家口市开展田间试验，研究了不同施钾量对胡麻钾素营养转运分配及其产量的影响。结果表明，胡麻根、茎、叶和籽粒等器官的钾素累积主要在生殖生长阶段，占全生育期累积量的41．28％～64．09％；与不施钾相比，施钾条件下胡麻根、茎和叶钾素转运量分别增加了35．60％，29．06％和43．75％。根、茎和叶中均有钾素转运到籽粒，转运率分别为17．78％～24．85％，14．82％～23．00％和39．40％～46．20％，对籽粒钾素的贡献率分别为6．71％～14．12％，11．24％～23．97％和17．26％～50．83％。较不施钾处理，低、中和高钾水平下籽粒产量分别增产14．90％～24．12％，29．93％～30．11％和15．65％～23．13％，且中钾处理下增产幅度最大。综合胡麻钾素积累、转运与分配规律以及籽粒产量，本试验区同等肥力土壤条件下，要实现胡麻高产高效以施钾量37．5 kg／hm2为宜。
