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Study on the High-Yeilding Cultural Techniques of Rice in Wenzhou

Author: LinHua
Tutor: LiuZhengHui
School: Nanjing Agricultural College
Course: Agricultural Extension
Keywords: Wenzhou Rice High-yielding cultural thchniques sdudy
CLC: S511
Type: Master's thesis
Year: 2011
Downloads: 5
Quote: 0
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Abstract


Rice (Oryza sativa L.) has the largest planting areas in all of crops in Wenzhou, and plays a very important role in food production. In fact, the problem such as inevitable severe weather, poor farmland infrastructure and unsuitable supporting technology, still restricts the development of rice production of Wenzhou. In present study, different rice cultivation techniques (direct sowing and seedling transplanting) are comparative analyzed, combining with the production fact in Wenzhou. To improve the planting benefit and yield for farmers, the low cost and high efficiency cultivation techniques of mechanical transplanting are advocated for early rice and the high quality and yield integrated cultivation techniques are popularized for mid-late rice. The cost-effective and high yield and quality cultivation techniques are instructive and feasible for rice production in Wenzhou.On the basis of observation of growth characteristics, several trials about sowing time, sowing quantity, fertilizer quantity, transplanting seedling age, transplanting density and fertilization method and so on were carried out with different varieties. Through the analysis of test results, half-dry type plastic plate seedlings techniques of the mechanical transplanting early rice are assembling optimized and formed as following:optimization varieties (Zhong jia zao 32, Zhong zao 22 and Zhong jia zao 17 and so on), sowing properly early (between middle March to early April), quantify sowing seeds (sowing quantity 150-200g/tray), scientific fertilization (pure N 49.5 kg/hm2, pure P 13.5 kg/hm2 and pure K 40.5 kg/hm2 in seedling ditch) and moistening irrigation. Meanwhile, with short-age, early planting and enough basic seedlings, the dosage of basal nitrogen reduced and tillering dosage increased, high-yield agronomic integration technology as following: fine ploughing, short-age seedling with early planted (seedling age 20d), appropriate transplanting density (rice bush 240-270 thousand/hm2,4.9 plant/bush, standard seedling 1200-1350 thousand/hm2), moving basal nitrogen dosage to tilling stage (pure N 195 kg/hm2, the dosage of basal nitrogen:tillering nitrogen:head nitrogen is 5:4:1 or 4:5:1), scientific field water management, is formed for early rice mechanical transplanting. This technology is suit for application and promotion in plains and semi-moutainous with developed economy, higher mechanization degree, better farmland infrastructure and larger scale.In order to improve the rice production, field multi-point experiments were done in mid-late rice about varieties, transplanting seedling age, seedling denisity, fertilizer and so on. As a result, the high quality and yield integrated cultivation techniques of mid-late rice suitable in practice is formed as following:selecting the large-spike cultivars, transplanting with mid-age seedling (3-5 leaf), appropriate sparsely planting density (120-165 thousand/hm2), moist irrigation, increasing topdressing fertilizer (the dosage of basal nitrogen:tillering nitrogen:head nitrogen is 6:2:2). It can result in strong roots and promoting tiller, strong stem and resistanting lodging, full source and vigour, more spike and grain, increase efficiency, reducing cost and increasing income. This technology is suit for application and promotion in mid-late rice planting areas in Wenzhou region.

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CLC: > Agricultural Sciences > Crop > Cereal crops > Rice
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