The Studies On Effects Of Anti-Drought And Water-Saving Integrated Technique Of Soybean On Sloping Farmland In Northeast Semiarid Region

According to low rainfall, unequal space-time distribution, and serious spring drought innortheast semiarid area, made integration experiments by selecting four mature anti-drought andwater-saving agriculture technologies, which are bed-irrigation sowing, seeding stage mendingirrigation, ridge plotted field water conservation, and vibration and loose deeply field waterconservation. The ultimate results of these technologies integration experiments provided threeanti-drought and water-saving models. Model 1: bed-irrigation sowing+seeding stage mendingirrigation+ridge plotted field water conservation(ZBQ); Model 2: bed-irrigation sowing+seedingstage mending irrigation+vibration and loose deeply field water conservation(ZBS); Model 3:bed-irrigation sowing+seeding stage mending irrigation+ridge plotted field water conservation+vibration and loose deeply field water conservation(ZBQS). All the experiments made in DongXingvillage, GanNan country, Heilongjiang province in 2005, where is 863 water-saving agricultureitem base. The studies tested all the differences of soybean yield, biology character index (drymatter accumulate, leaf area index), water consumption in whole growing stage, seed water useefficiency, and the shoot water use efficiency in the three anti-drought and water-saving models.The studies will contribute to appropriate anti-drought and water-saving integrated technologicalmodels by analyzing and estimating the results of these experiments.The results indicated that appropriate anti-drought and water-saving integrated technologicalmodels can remedy the shortcoming of every technology, and they can solve the agricultureproblems in the region. Bed-irrigation sowing and seeding stage mending irrigation both areeffective on anti-drought and water-saving work. The results of seeding stage mending irrigationare superior to those of bed-irrigation sowing. In ridge plotted field water conservation or vibrationand loose deeply field water conservation models, water can be conserved around the soybean roots,and the more water can be used to grow by soybean. That is to say, the more water can beconsumed by soybean, the more dry matter can be accumulated by soybean.All the anti-drought and water-saving integrated technological models enhanced differentlythe yield, biology character index, water consumption, soybean water use efficiency, the shoot water use efficiency, and production value. Production of the three model increased approximate3.59～17.70%, and production value increased approximate 10.05～36.75%.All the anti-drought and water-saving integrated technological models are effective onsoybean biology character index (yield, dry matter accumulate, leaf area index). In generally, thetrend is that leaf area index and dry matter accumulate augmented, when the quantity ofbed-irrigating sowing and seeding stage mending irrigation increased.All the anti-drought and water-saving integrated technological models enhanced differentlyseed water use efficiency and the shoot water use efficiency. It is not obviously in modelⅠandⅡ, but it increased 19.55% in modelⅢ. The shoot water use efficiency increase approximate28.29%～63.35%.According to the results of data comparison, all the anti-drought and water-saving integratedtechnological models were graded as follows:Model 3 dispose 6, model 3 dispose 5, model 2 dispose 6, model 1 dispose 6, model 1 dispose5, Model 3 dispose 3, model 3 dispose 4, model 1 dispose 4, model 2dispose 4, model 2 dispose 5,model 1 dispose 3, model 1 dispose 2, Model 3 dispose 2, model 3 dispose 1, model 1 dispose 1,ZB dispose 6, model 2 dispose 2, model 2 dispose 3, model 2 dispose 1, ZB dispose 3, ZB dispose4, ZB dispose 5, ZB dispose 2, ZB dispose 1.In 2005, the optimal combined technological measure is "ridge plotted field waterconservation+vibration and loose deeply field conservation+bed-irrigating sowing(120m~3/hm~2)+seeding stage mending irrigation(120m~3/hm~2)".