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南方粳稻生产与发展研究及对策 总被引:5,自引:0,他引:5
发展粳稻生产是我国稻作生产研究领域的一个重点。本文重点阐述了南方稻区粳稻生产概况,分析了生产发展过程中存在的问题,进而提出南方粳稻发展对策,最后总结了南方粳稻生产发展需要注意的事项。 相似文献
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近年来,随着我国农村土地流转步伐的加快,家庭农场在我国部分地区迅速成长,成为现代农业发展的新趋势。本文分析了当前我国家庭农场的发展现状及面临的主要问题,提出了进一步发展与创新的对策和建议,以期为我国家庭农场的快速、健康发展提供理论依据。 相似文献
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本文简述了当前世界天然橡胶业的基本概况和云南植胶技术成就及生产现状;简析了云南天然橡胶业现在的若干问题,提出今后发展的对策 。 相似文献
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1 马铃薯生产现状1 1 生产条件阜阳市地处黄淮平原南端 ,跨湿润、半湿润气候交界线 ,气候温和 ,季节分明 ,雨量适中 ,光热资源丰富。主要表现 :一是降雨与马铃薯生长需水规律相吻合 ,有利于幼苗生长和块茎的膨大 ;二是气温适宜马铃薯各个阶段的生长 ,有利于各时期对气温变化规律的要求 ;三是光照条件有利于幼薯的形成和块茎膨大 ;四是土质及土壤肥力有利于马铃薯对土壤养分的平衡需求。1 2 生产状况1 2 1 品种利用70~ 80年代 ,我市界首县是全国四大马铃薯生产县 ,界首马铃薯原种场承担着全市马铃薯品种引进、筛选、种薯繁育和配套栽培… 相似文献
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《Journal of Crop Improvement》2013,27(1-2):247-275
SUMMARY Soil salinity is assuming menacing proportions for production of agricultural and horticultural crops in South India. South India comprises of Andhra Pradesh (AP), Tamil Nadu (TN), Karnataka, Kerala, Goa, and Islands in Bay of Bengal (Andaman and Nicobar) and Arabian Sea (Lakshadweep). It comprises central uplands, Deccan plateau (Karnataka plateau and Telangana plateau of AP), Nilgiri hills of TN, South Sahiailri, Eastern hills (Eastern Ghats, TN, upland) and Coastal Plains. The rainfall ranges from 400 to 500 mm in AP, 450 to 1300 mm in Karnataka, 500 to 1215 mm in TN, 100 to 450 mm in Kerala. Climate is mainly semi-arid in nature. Red soils (Alfisols, Inceptisols, and Entisols) make up about 60–65% and are well drained, blacksoils (Vertisols and Inceptisols) comprise about 20–25% and the rest are coastal sands. Soil salinity problems are encountered in almost all the districts in Karnataka and AP. The area extends to about 0.176 million ha in AP, 0.2 million ha in Karnataka, 0.0427 million ha in TN and about 0.03 million ha in Kerala. Introduction of canal irrigation water and use of underground saline waters accelerated the appearance of salt affected soils. Soil salinity observed in South India ranges from hydrometphic saline soils in Kerala to highly saline (EC 20–30 dS m?1) in Karnataka and AP. Saline soils were classified in to Natrargids or Solarthrids at subgroup level depending on the occurance of nitric or salic horizon within few centimetres of the surface. Soil salinity has reduced crop yields upto 50% and consequently cropping has been abandoned in many areas. Excess soluble salts can be removed through scrapping the surface salt crust or flushing and leaching or through subsurface drainage depending on the problem. Crops also vary in their ability to tolerate salinity at different stages of growth. In most crops subjected to irrigations with saline waters, germination and early seedling stages are generally the most sensitive and their tolerance increases with age. Salt tolerant varieties and nutrient management of crops in saline soils are important solutions for crop production under saline soils. 相似文献
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随着经济的发展和人们生活水平的提高,云麻的根、茎、叶、花、果实的广泛用途越来越被人们认识和开发利用。将成为今后纺织、建材、食品、医药以及“生物柴油”不可多得的天然(环保)、可再生重要战略资源。“十一五”时期,西双版纳州州委、州政府把发展云麻产业作为新兴产业加以培植。并列为农民增收“六个一千元”项目之一,通过产业化开发、以工促农的发展模式,实现农民增收。农业增效,财政增长,对推动农村经济特别是山区、半山区农民脱贫致富具有十分重要的意义。 相似文献