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Shanxi Agricultural University (2003)

Ecological Effects of Water-permeability Plastic Membrane on Maize in Dryland

WangJun

Titre : Ecological Effects of Water-permeability Plastic Membrane on Maize in Dryland

Auteur : WangJun

Grade : Master’s Theses 2003

University : Shanxi Agricultural University

Résumé
Water use issues are the main factors restricting the development of dry farming , the mulching cultivation is one of the ways to solve this problem . The plastic film is a new type of mulch to improve the rainfed crop water use efficiency ( through the drizzle resources effectively based ) of . This test is covered by plastic film , ordinary mulching , straw mulching and open field the four processing of the ND108 corn the water use efficiency , growth and developmental processes and production analysis , the results showed that : new plastic film the seepage role in its utilization effect of autumn plays an important role , and its seepage , pure water of the combined effect of the water than ordinary plastic film and straw covered the improvement of the soil moisture superior , specific performance in the test before sowing processing plastic film covering the highest soil moisture . Plastic film covering on the dual role of soil moisture in corn growth the seedling stage performance of the most obvious , and laid a good foundation for the growth of corn late . The minimum water utilization throughout the period covered by plastic film covering the highest fertility period plastic film covering corn stress coefficient the highest effective utilization of the water . Plastic film covering conditions , the corn in various growth stages vigorous growth , the functioning of the various organs ( the more obvious is the group of roots and leaves of maize , stems and leaves of the group and spike foliage leaf area ratio is more reasonable to 1:5.79 : 3.79 ) , throughout the growth and development of a coordinated and orderly, all the physiological indicators , such as chlorophyll content , membrane permeability, nitrate reductase activity , are higher than other treatments ; proline content in the lowest of the four processing . Straw mulch and the open field corn in the whole growth period , especially straw mulch organ development disorders (eg, root , root and foliage growth is not full and excess stem, ear foliage growth ) , leading to a late growth stages the stems and spike compete for limited photosynthetic products , dry matter accumulation timely allocation unreasonable and ultimately reduce economic production . The plastic film covering the highest yield under maize , followed by ordinary mulching , straw mulching and open field

Mots clés : Plastic film Corn Rainfed

Présentation (Dissertation topics)

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