水旱连作高产田作物群体生产力的研究

A STUDY ON POPULATION PRODUCTION CAPACITY OF CROPS IN HIGH-YIELD FIELDS OF WATER-DRY CONTINUOUS CROPPING

本文研究了川西平原水旱连作高产田作物群体生产力和复种模式。结果表明，麦稻两熟和麦稻秋玉米（或马铃薯）３熟制都可高产，产量分别为１５２１７．５ｋｇ／ｈｍ￣２，１５７４０．２５ｋｇ／ｈｍ￣２和１６５５７．０ｋｇ／ｈｍ￣２。年光能利用率，经济产量分别为０．９１％，０．９４％和０．９９％，生物产量分别为１．９６％，２．２９％和２．４２％。每公顷产６０００ｋｇ以上小麦群体最大叶面积系数为５．５～６０，最高苗为６９２．６５～７６９．１２苗／ｍ￣２，经济系数为０．４３～０．４４。每公顷产９０００ｋｇ以上水稻群体最大叶面积系数为７～８，最高苗为３９３．１０～４６１．４７苗／ｍ￣２，经济系数为０．４８～０．４９。在麦稻秋玉米中，每公顷产７５００ｋｇ左右杂交水稻品种宜选用早熟类型，秋玉米提早育苗保证９５～１００天的生育期。秋马铃薯提前７～１０天催芽，保证７０天左右的生育期。

This paper reports a study made on the sequential cropping methods and population production capacity of crops in high-yields of water-dry continuous cropping in the western part of Sichuan Plain. The results indicate that high yield can be reached in the fields of both wheat-rice-two-crop-a-year and wheat-rice-autumn-maize(or potato )-three-crop-a-year continuous cropping system,correspondingly the average grain output per hm￣2 is 15217.5 kg,15740. 25 kg and 16557.7 kg.In the efficiency of light energy use per year,the economic yield is 0. 91%,0. 94%and 0. 99%,and blological yield is 1. 96%,2. 29%and 2. 42%. To wheat crop population yield of more than 6000kg/hm￣2, the LAImax is 5.5～6.0,the highest number of wheat seedling is 692. 65～769. 12/m￣2,the economic coefficient 1s 0. 43～0.44.To rice crop population yield of more than 9000 kg/hm￣2,the LAImax is 7～8.the highest number of rice seedling is 393. 10～461. 47/m￣2,the economic coeffi cient is 0.48～0.49.Early mature type of hybrid rice for 7500 kg/hm￣2 is selected in wheat-rice-autumn-maize multiple cropping method, and auttimn maize seedling is grown early to assure maize growing period of 95～100 days. In the wheat-rice-autumn-potato multiple cropping method.the potato pre-sprotiting treatment is done before 7～10 days to ensure potato growing period of abotit 70 days.