论文部分内容阅读
稻田泥炭土含钾量较少,其速效钾供应能力只有矿质稻田的三分之一,缓效钾仅达四分之一。在这类土壤上施用钾肥,由于改善了土壤钾素供应状况,促进了水稻生育,从而能显著提高产量。据全省多点试验,当亩施氯化钾14斤时,亩均产为671.3斤,较对照增产28.2%。在水稻各生育期,反映植株钾素营养丰缺状况的部位,分蘖期为混合叶鞘,拔节期为刚开始伸长的茎杆,孕穗期为顶叶往下第一节茎杆,成熟期为混合茎杆。水稻对钾素营养最敏感时期为拔节期。钾肥的适宜用量为亩施氯化钾14—21斤。
Paddy soil peat soil less potassium, its available potassium supply capacity of only one-third of the mineral paddy, slow-acting potassium only up to one-fourth. The application of potash to such soils has resulted in a significant increase in yields due to improved availability of soil K and improved rice growth. According to the province more tests, when potassium chloride Kushu 14 kg, mu average 671.3 kg, 28.2% increase compared with the control. In the different growth stages of rice, the position of plant potassium nutrition abundance and deficiency was observed. The tillering stage was hybrid leaf sheath, the stem which just started to elongate at the jointing stage, the first stem from the parietal lobe at the booting stage, the mature stage was Mix the stems. Rice is the most sensitive to potassium nutrition at the jointing stage. Appropriate amount of potassium for potassium Shi Shi Kasho 14-21 pounds.